I think it's pretty clear that other people's preference for nicknames (or gender pronouns) are not a burden on you and your insistance to call people by the wrong name (or gender) is for some other reason. That was my point. This isn't about trans people causing undue burden on you.

You don't have to pretend. Nobody thinks my name is actually "Mike" but if I ask you to call me that instead of "Michael" then what is it to you?

And if you really feel that your gender is being intruded upon by trans people then i encourage you to find something more meaningful and unique to attach your identity to, because your manhood feeling threatened is not a respectable reason to deny trans people their identity.

> why do I need to care again?

I was going to ask you the same!

You describe one possible situation, let me imagine a different one. I say that I like going by Mike, and you keep making a point of always referring to me as Michael even when it doesn't really make sense to go full formal. After multiple months of it, I kinda get tired of this and decide to accept offer from another company and tell our boss that. When they ask me why I want to leave I'll be sure to mention that, and maybe they'll evaluate our productivity and decide it's better for business to just fire you instead. See how different those two situations are even thought the premise is the same?