Yeah but then you can't easily visit specific subs. When I was younger and didn't have an account, I would just go to the url to view my favorite subs, and uuid's would make it less intuitive.

One other option sites like scored.co do is they allow subs to use their own url (like their Trump sub is called patriots.win). The site admins have kind of given up on the site though so I'm not sure if you can still do it, but it seemed like a clever idea.