I believe that there's some factors that can have it come up innocently, such as someone saying "I need to be off by three, my boyfriend's coming over to take me to see his mom." But from personal experience, a lot of it comes from folks being unnecessarily vocal IE "As someone that's ___" "It's just something that we ___ people do" or "I'm ___ and I find that offensive." It's also a rather new trend to list your pronouns or announce them upon entering a new guild. It's hard to tell if offering that info when nobody asked is a trend, or what.
