John, I appreciate what you are saying. Truly. But the "attack" in this case
is on his argument. The argument from authority is an illegitimate one in any sort of reasoned debate.
The first part was "I believe the ancient Chinese masters". That is fine as far as it goes. The clear implication, since it was in response to a challenge, was "Because I believe them, you should believe them." That's the argument from authority.
The second part was "I've been doing martial arts for forty years". This may well be true, but it is totally irrelevant to the issue at hand. It's a closely related fallacy - that expertise in one field gives one authority in another. Martial arts is the science of hitting people at the most exact level. One may well learn other things, but no number of black belts makes one a physiologist, a doctor, a lawyer, an accountant or a diesel mechanic unless one has acquired the specific training to be considered proficient in one of those disciplines. Bolstering one's argument about biology with reference to one's experience in martial arts clearly says that one is using an irrelevant fact to bolster one's argument.
The next part, the police officer bit, is an extension of the previous point. Experience in one profession does not imply experience in another. It was added for the sake of illustration in the same manner. That which is relevant is relevant. That which is not is not, no matter how praiseworthy.
Those with training in biology and physiology may certainly use that experience to speak with on the subject with some expectation that others will consider their opinions at least worth listening to. They are informed opinions coming from someone with some known expertise in the subject. Those who use irrelevant statements or well-known logical fallacies to support their views must expect to be greeted with somewhat more skepticism on those grounds if no other.
I must add further, that physical evidence, when well gathered and impartially presented, trumps pretty much any logical construction or theoretical belief. In the case of TCM we know for irrefutable fact that much of the theory is garbage. The example of the spleen is simply one of the most glaringly obvious. We know that many of the techniques do not work. Therefore, its claims must be accepted with greater care than those which have a firmer foundation in physical reality. There is certainly much of value, and there are huge areas which are still mysterious. One may see many strange things and record the observations accurately. Correct interpretation of the results is another thing altogether and depends much more on particular expertise in the relevant disciplines.
To quote one of my favorite authors:
"It is the difference between the unknown and the unknowable, between science and fantasy - it is a matter of essence. The four points of the compass be logic, knowledge, wisdom and the unknown. Some do bow in that final direction. Others advance upon it. To bow before the one is to lose sight of the three. I may submit to the unknown, but never to the unknowable."