I'm not a sports injury expert so simply reading about their injuries doesn't say much particularly in the case of Zimmer (or Jose's finger). You know stuff about him gripping the bat years later, stuff that I had absolutely zero clue about. Frazier, you can probably connect the dots well enough from the outside, sure.
It may be a bit charitable but IMO what we see here is someone making hypotheses and then overconfidently making arguments that are weaker than they appear on the surface. There's no ill will.
That's a very polite way of saying someone's being a smug cock.
Nobody is saying you have to be an insider to post ideas or to debate opinions.
I didn't use the word silencing, but I guess you could think of it as social pressure silencing, similar to cancel culture. If you create an environment in which people are unwelcome to post their hot takes confidently for fear of being wrong it will be a lot less fun IMO. One person posts something that has something wrong with it, and then the swarm comes in.
I know you didn't use the word, but when you talk about the absence of posts, it's a pretty reasonable leap.