There are paid relays and other filtered relays out there. WoT can work as long as you’re not trusting Reply-guy types.

We’re lucky that Nostr is an open protocol and anybody is welcome to build their own clients and relays on top to filter out the spam. It’s easy to criticize but most of the devs are building and running this infrastructure in their spare time for free so we should be thankful it works at all honestly.