WoT is quite an unreliable metric, so it would need to be a custom “trusts this person” kind (follow != endorsement)

even then, risks like compromised nsecs (see Shai-Hulud worm), actors building up reputation with skills with hidden backdoors, etc.

and there will always be new devs making new skills, and so people will regularly disable the filter anyway

nostr doesn’t win by slapping WoT onto a context that is even less applicable to it.
it does by providing more tools to users and developers, for example automated malware scanners