Author has completely misunderstood UUID user case and purpose.

UUID is not cryptographically unique id. Never has been. It's for cases where nobody has bad intention.

UUID is still good for it's intended purpose. Avoid collision when generating id's for systems that have no way to coordinate.

Why do some people use UUIDs in the first place? Some kind of cargo cult?

largely because you avoid the incrementing DB key issue if you have an exploit or opening. another reason is when you have so many rows in your table you overflow numerical keys