I don't want side-loading apps on iPhone. The moment you allow side-loading you can no longer trust the apps on a phone. Is it really facebook or was facebook removed and replaced with something else.
Side loading is not the same as installing apps as a developer for testing.
2nd, sure you need a passcode etc to accept the install, this every-now-n-then gets by passed.
You can't. You can't know if whatsapp was replaced with whatsapp that syphon your data.
"Don't side load then." is a poor argument.