Yes, that's true. There are situations where it can be a sign of respect, I agree.

However, as a binary trans woman, it'll never be that simple for me. If I get they/themmed by a stranger who doesn't know, I spend the entire day worrying about what I did wrong in my presentation to not be simply referred to as "she" that time.

This isn't anyone's fault. No one's a mind-reader. And overall I think this practice is good, though not without some minor criticisms that probably aren't worth mentioning since it would take an essay to unpack.

I get gendered more when I wear a they/them pronoun lanyard, but had to add a she/they pin so people would stop apologizing for she's.

There's no good answer that's going to work for everyone, I just wish the world was kinder about speaking up for ourselves.