I do agree that people in the same sport will train the same muscles, but they normally start with a biological advantage in order to be good enough in the sport to start to train specifically for it to begin with. There are other things than height, such and foot/hand size, torso length, natural testosterone levels, how fast your body removed lactic acid, if you were born with a cardio-vascular issue, dozens of factors that affect your balance, and much more.
Someone with Ehlers-Danlos isn't likely to become a powerlifter.
You need to listen to him because it's a meeting at work, he's higher up than you are, and your job is at risk.
https://youtu.be/bkjfZctGMq8?t=241
The link skips half of the speech, if you have 8 minutes, watch the whole thing.