Hmm. Well, this is interesting.
ATC, I hate to say it, but you are being overly sensitive to a non-situation. What Bruno said, if you take his entire sentence, rather than just the fragment you constantly use, in context, he simply stated that due to who he is (a white middle class male), what he does (he is an engineer, a rather safe indoor job), and where he is (uh, Belgium actually. We'll return to this though...), he is fairly unlikely to be involved in a serious violent encounter. Therefore his need for full contact sparring, and the added risk of serous injury which could take him from his livelihood, was not sufficient to justify it in his personal circumstances. So you know, I'm in a very similar situation. I'm a white, middle-upper class male in a very safe job in a very safe environment with a very safe lifestyle.... hmm, I suppose I'm racist now that I mentioned a simple fact too.
You then siezed upon one word, "white". For you that made his entire comment about race, when that was one of many different aspects of his personal situation that he brought up... not first, not last, just one of quite a few. But you leapt on it. That suggests a few things to me. For one thing, it suggests to me that you haven't taken the time to recognise the full reality of Bruno's situation, or his post.
Another thing it suggests to me, and forgive me if any of this is incorrect, I haven't really followed your posts on the forum in general so this may have been addressed by yourself or others at some point, but I feel that perhaps you yourself are not white. I would probably guess Hispanic if pressed. Your location is given as San Jose, so it is not out of the question that you have seen both racism and reverse racism, depending on exactly where you are, with yourself, your friends, your family, and people around you in general. But you need to remember that that is your situation in your home. In the US.
Bruno is not in the US.
Although I would never suggest that racism is only present in the US, or that it doesn't exist in Belgium (or anywhere else, for that matter), the US does seem to have it's own peculiar brand. There are many reasons for this, and I'm not going to go into them here. The point is more that you actually cannot apply the same hysterical politically-correct standards to other cultures and societies, and when reading Bruno's words (or mine, I'm not in the US either), you cannot apply your personal meaning and construe that he or I, or anyone, are guilty of racism that frankly is present only in your interpretation.
With the comments about the relative seriousness of a concussion, I believe what Bruno was saying was that with his life and circumstances as they are, risking a concussion in training when weighed up against his likelihood to require the benefits of such hard contact in training in the immediate future were minimal. However, for another who was more likely in need of immediate ways of handling sudden violence, such training (the risk of a concussion due to solid contact) had immediately recognisable benefits, so it would be more realistic for them to train in such a manner. It was not that the concussion itself would be less serious, it was that the relative risk made it less of a serious issue (as the higher risk of a violent encounter in the near future was more of a serious issue for our fictional high-risk individual). You really are reading too much into this.
As to disputing the statistics, well, you're really up against it there. Certain racial groups, same as certain socio-economic groups, same as certain age groups, same as certain gender groups, same as certain sexual preference groups, same as any other group with a significant differential, will be more or less likely for certain life experiences. Any study/statement (that can be backed up) which claims such is not racist/sexist/prejudiced etc any more than a statement that saying that white cars tend to stay cooler than black ones. It's just an observation, devoid of judgement or blame. That is how Bruno's statement was to be read. You may want to go back and re-read it, perhaps the entire sentence this time.
As I said, I get the feeling that racism has been a part of your past, and is possibly still quite a part of your present, and for that I am sorry. But that in no way makes any tiny mention of race a racist statement, and you may need to widen your own views of prejudice before re-entering this discussion. Granfire and JWLuiza have been more than correct, and Bruno has been unfairly vilified. I may even go so far as to suggest an apology may not be out of the question.
Okay, that was interesting for a bit.
As to the OP (although I'm noting that they have yet to return and post again, let alone reply here), those injuries are far from serious. We don't spar, but we push things pretty hard, and injuries, although not common, do happen. If you are training a martial art, recognise that a big part of the training is getting you used to (become comfortable) a dangerous situation. And some exposure to injury is to be expected. It should never get to the point where control is forgotten, but there needs to be some risk.