I’m trans and agree with this, though I offer another reason to avoid making it compulsory.
Before I came out I felt very awkward with regards to my own pronoun display. I wasn’t ready on one hand and on the other I felt terrible seeing other pronouns even if it was attached to my deadname only.
I’d encourage people to do it if they’re comfortable with it on a personal level as it can be a very personal thing. I also want to thank all of those who do add it. It’s a big deal for many of us and can make a real difference in exchange for very little effort.