Then why is it that there seems to be a bias that everyone must follow the same regimented proper “form“?

For example, the bench press. The problem is that there is generally only one position that the barbell is held on the bench press, and it cannot be adjusted. Even if it could be adjusted, everyone has different bodily proportion, in terms of arm length, leg length, torso length, back flexion, etc.

This is why it also seems silly to be too focused on “squatting at parallel,” — everyone has different bodily and leg proportions. The formation of their knee, their quadricep leg muscle, and also their calves and shin muscle.

Also, deadlift. This is why it seems to be a good innovation that they invented the sumo deadlifts form, which actually I find as superior to conventional form, as it allows superior leverages. Also it might be better for guys who are taller.

And even better innovation is the high handle trap bar, or open hex bar. Why? Once again, a bodily proportion thing. I am able to lift far more with a high handle open hex bar with a traditional barbell just at the floor.

Moral of the story: when it comes to lifting weights, or fitness related things, don’t follow any conventions. Experiment, tinker, Bricolage yourself into a supreme approach.

Another way I have been able to bench press over six plates, while doing it on the floor, slightly elevated. Better leverages, better arch and better ability to drive with my legs.