The charitable (and honestly realistic) take is that the word filter check they added was just slapped on to any name entry field since it all uses the same system anyways. Why bother trying to carve out specific exceptions to something almost nobody cares about in the first place, assuming they even wanted to?

For the record, $20 for these ports is a crazy ask, especially when the only online feature being added is Pokemon Home support. Modern Nintendo is really depressing, and it's really difficult to convince people not to consume product because of how locked in Nintendo fanboys are.