As long as their wallet has the ability to purchase Bitcoin using fiat rails, there will be KYC involved, and I think that feature is helpful for those who are new to Bitcoin, so they can dip their toes in with a relatively low barrier to entry. If there is a group Primal is targeting with their app, it's the person who is not well versed in either Bitcoin or Nostr. It is not a client designed for power-users of either protocol.