Gender is an important part of self-representation and from all indications, one people have very little control over.

So why are there people changing their “gender identity” multiple times a day?

so called “feelings” are scientific facts and we do studies on them all the time

Show me a scientific study that has found any existence whatsoever of “gender identity” through science. The very article linked here says it’s a social construct. Social constructs are not “scientific facts”.