I suppose for aesthetics. I'm with him
nostr:npub1ye5ptcxfyyxl5vjvdjar2ua3f0hynkjzpx552mu5snj3qmx5pzjscpknpr why this?
Nostr has no usernames, and no rules for the name field.

Discussion
I can't understand, we're talking about having a rule in the names by aesthetics, in a decentralized, uncensored network, really? 😅