No, it's a benefit of the fact that side-loading (the most common malware attack vector on Android devices) is not possible on iOS.

Sideloading is totally possible. It is just ordinary customers don't have the right to do so.

I suppose that depends on how exactly you define side-loading. I'll go ahead and clarify that I meant having a platform-sanctioned method of bypassing the default app store and instead downloading and installing third-party apps from the internet. But I think you could probably tell that from the context of the sentence.