Pretty easy to download a wallet that’s stored in the Secure Enclave of your iPhone with an encrypted backup to your Apple ID account and all those problems go away.
Keys are still safe in your phone. It’s an encrypted backup. Random Apple employees can’t get to the private key.
I’m not interested in goalkeeping both sides of the convenience-security spectrum. Bury your keys in a tin can if you want, or custody at an insured exchange if that’s your preference. I think installing say Rainbow Wallet is a fine choice.