[JimDabell]

It’s not just external systems. In many (most?) places, when sorting by name, you use the family names first, then the given names. So you can’t correctly sort by name unless you split the fields. Having a single field, in this case, is “an oversimplification that leads to errors”.

[roywiggins]

Right, but then you have to know which name is the family name, which really could be any of them.

[JimDabell]

I’m not sure what you’re trying to get at. The field containing the family name is the one labelled “family name”. You don’t have two fields both labelled “name”; there’s no ambiguity.