1 Apple sold computers for decades, so all those people then and still using Apple computers survived with side-loading 2 Malware was found on the AppStore 3

1 Apple sold computers for decades, so all those people then and still using Apple computers survived with side-loading 2 Malware was found on the AppStore 3 Fishing and scamming does not need an app, to fix this you need to educate people. 4 The phones can be secured by default. If you are an "admin" for you familyu then you can keep the "unlock" keys so they can't open the gates.