I'd guess the following: if Apple is a company that is mostly trying too sell UX and seamless integration as a part of that, but has to break quite a lot of tha

I'd guess the following: if Apple is a company that is mostly trying too sell UX and seamless integration as a part of that, but has to break quite a lot of that every time an 'extreme' protection measure is used, then it stands to reason that they'd make the 'mess up the UX' thing all contained in one option. It makes for a very clear demarcation as to why the product doesn't work as it normally should, and an abundance of differentiation would remove all of the guessing as to "why is feature X not doing what I expect" for the user of the device.