Why doesn’t every nostr client integrate a wallet?

What advantages does a client have that doesn’t have one built-in? 

I want to zap newcomers using #introductions, yet it seems few and far between being able to actually zap those newcomers who have to learn about setting up a wallet if their client doesn’t have one built-in.

Wouldn’t having it already built-in improve UX for all involved? 

Could you allow a toggle to not receive zaps if a newcomer so desired? 

 Newbie looking for first zap haha! Will use hashtag in next post. 

 I’m trying to zap from Primal client, but it’s not going through 

 Maybe try my public key? npub1qyar3c7nf3929nwg3un7ukvyyld2vdyjx2cw44nw5vlqn345wgdsnxleg4 

 I have no idea what I’m doing haha.