I think what most drives the issue for side-loading is that Apple has claimed that now allowing side-load helps for security, but Apple's claims on security are

I think what most drives the issue for side-loading is that Apple has claimed that now allowing side-load helps for security, but Apple's claims on security are not as bullet proof as they allude to. I'd much rather them say, no side loading because we want out 30% cut and that actually be true than to say, no side loading because of security risks when nothing really proves their stance has improved security.