Pronouns are important information for any platform where people are communicating.
If I need to refer to something someone else has said, I'd need to say something like "@user123 said that [they]'d used an RD-107, not an RD-108, which is why [they] didn't have enough delta-v", and if a user cares to fill in the profile field, being able to see how I should refer to the other user is important.
I can work around this by putting them in my signature block, but that's a workaround. Ideally it...