@cassolotl seems like when it comes up ppl raise the following points:
1) there are some abuse concerns around account deletion
2) there's no way to export your toots
3) deleting a toot sends a notification to every instance that is subscribed to the toot's author, which isn't necessarily all the places the toot ended up
and none are really clearly resolved
so as worthy as it is it's hard to make account deletion a priority you know?
at least that's my perspective