That you are all being politically correct, as expected. Martial art techniques are not subjective in their delivery. 9 out of 10 young black belts don't have hip replacements. The objection offered simply doesn't cut it. I find it an utter disgrace to never reject black belt testers. I know TKD schools that do, and they have my respect. They care about more than money.
Politically correct? I don't understand what you mean by that.
"I find it an utter disgrace to never reject black belt testers" This sentence also makes little sense. A 'tester' is the person who tests the students, not the person who takes the test. There's no reason to 'reject' anyone who wants to test for a belt, you can and many, many do,
fail students who do not do well enough in their grade testing. Not just in TKD but many other styles as well.
Martial arts should be for everyone who want do them, we as instructors should be enabling as many as possible to train. Very few people are without physical imperfections, some may have 'hidden' conditions such as diabetes, MS, asthma etc. Others may have something like hypermobility, ADHD, dyspraxia etc. I've taught people with all those conditions. A friend of mine teaches Judo to blind people, another has an instructor who only has one foot ( it maybe TKD I'll have to ask). We aren't about making 'perfect' martial artists we are about making people the best martial artists they can be. We have a separate class for those that want to be MMA fighters, pro or amateur but even they are trying to be the best they can be not the 'perfect' MMA fighter.
Come down off your high horse, it must be cold up there. Accept that people do their best and while it's good to have ideals, you have
no right to criticise them because you are a beginner with no experience, no knowledge other than knowing something is 'correct' when you see it, well, sunshine, we can all do that. I can look at a Rembrandt and think well that's perfect, can I do it, can others, no they can't but that doesn't give me the right to criticise them for trying and for trying their best at that.
I have a T-shirt that says on the front 'STFU and train'... imagine I'm wearing it now.