Why do, relatively, so few of you set an avatar for your profile?

In comment sections or in community pages, it's mostly an ocean of default avatars. As a UI developer, that's always been a gripe because I put a lot of effort into making them look good and scale properly, etc. So, since this bugs me so much, figured I'd just ask. Lemm.ee users I can understand because of the waiting period for uploads, but AFAIK, most instances don't have that restriction. Even then, there are plenty of `.ee` accounts that never bother to go back and set one.