Meh. You can just trust an aggrigator directly like on that demo-site, or a nice market place where you select your providers, pay and move on with your day should do it. 

Judging whom to trust is a problem in so many places/things yet the world still functions. 

 Me is the wrong attitude if your mission is to make public keys usable for most people. But I don't think I can offer much better alternatives given that key delegation was already rejected in Nostr before.

Diversity of experiments are good as well.