If someone tells me their pronouns I will use them, but mostly will tend to avoid using anything other than their name or you.
I have been to several online meetings when someone has introduced themselves as a they and them. Nobody else felt the need to announce their pronouns. In one meeting the “they” person reminded the meeting of their pronouns again mid-meeting. Nobody knew why. Or when they had been misgendered or by whom. The meeting took on an odd atmosphere- what we were there to discuss what thrown off course by wondering if you were the one who had misgendered them, and how much trouble you were in. Nothing came of, none the wiser why they inserted in a reminder mid meeting. It just interrupted the flow of the meeting and the attention was on all on them.
We live in an age of vanity where we all think we are special. It’s not enough to think you are special yourself - people want external validation that they are, they want to compel people how to think about them. Pronouns falls into that attention seeking behaviour. It’s inward focusing, all about them. I will use their pronouns to be polite, but would avoid communicating with them where possible, so in that sense they are a barrier to communication. It’s a complex area, and who needs the hassle of getting involved in it. Easier to opt out and avoid as much as possible.