This is the crux of the issue - Doing away with trust in light of verifiability comes at a cost, currently - I consider all my sats precious enough to pay that cost to, in turn, better safeguard my sats. Not all will agree, many just might!
Good point to remember. But isn‘t that the case for any (non-custodial) wallet? Fees are everywhere and with nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5 you at least have a clear information about them. Plus, they clearly state in their documentation that the initial transfer should be > 100k sats. Custodial wallets probably don‘t levy such fees because they can sell your info/data and, anyway, they have your sats 😉
Discussion
I have run fully self custodial lightning before with a node at home, my own domain for lightning address, etc. Let me put it this way, I risk lose FAR fewer sats in custody on a custodial wallet than you risk in fees and channel open/closures. Experimenting with self-custody lightning is absolutely recommended. But you will lose a lot of sats and you will cause other users to lose a lot of sats by recommending they use ZeusPay for receiving zaps on nostr.