Before this instance (and still, I guess?) I had a few different accounts with the same user name on different instances, specifically because there was a lot of defederation going on.

It is a very mild inconvenience to switch accounts. I understand it also limits who can see what's here, but like others have said, it also keeps this instance peaceful and friendly. People can make accounts if they would like.

I think it's the right move, especially with people obsessed with how others run their own instances. I for one am shocked that carnists feel entitled to determine how other beings should live 🙄