Agreed, If it can be spammed it will be spammed. Problems don't come at a time suitable to you. I'm glad we had solutions, even though all of them had certain tradeoffs. Spam is not exclusive to nostr, and we need solutions now, and not fail when it's already too big.
I think of all the solutions, the WoT solution had the least concerning tradeoffs, especially how https://coracle.social had already implemented it.