My point is that steak is very, very, very far from the hardest to get right. I'm not going to contest your argument about
how hard it is to get right, I'm going to argue that innumerable other dishes are
vastly harder. Because the quality ingredients are harder to find, because they involve far more steps, each of which is harder to judge, because often good recipes or instructions simply don't exist, etc. etc. etc. Every single difficulty that you imagine exists to make a truly great steak exists 100 fold for other dishes.
In my opinion, steak has gotten the reputation that it has because it's so easy to get top tier restaurant quality at home (relative to cooking more generally). It is easy enough that, with a little care, almost any one can master it if they decide to, and therefore lots of people try and end up caring, and discussing, and sharing tips, etc.
There are a whole host of dishes where true mastery, to restaurant level, is borderline impossible for a home chef, and so most people never even try.
I don't disagree that reliably getting the last 5% of quality out of a steak is non-trivial, but the idea that, relative to the entire world of cooking, it's particularly difficult is laughably incorrect.