You have a point, but what I'm most concerned with is balancing these two things:
1. I don't want to inconvenience people with "weird" names.
2. I don't want to burden application programmers too much.
Requiring everybody to have a simple ASCII name would be convenient for programmers, but would be a big hassle for people whose names don't meet those requirements. "Be in the Basic Multilingual Plane or get a nickname" is a policy that, I think, provides a reasonable balance. Of course, supporting all of unicode isn't really that much harder, so I think that's a better balance.
1. I don't want to inconvenience people with "weird" names.
2. I don't want to burden application programmers too much.
Requiring everybody to have a simple ASCII name would be convenient for programmers, but would be a big hassle for people whose names don't meet those requirements. "Be in the Basic Multilingual Plane or get a nickname" is a policy that, I think, provides a reasonable balance. Of course, supporting all of unicode isn't really that much harder, so I think that's a better balance.