The scenario that merits trusting the OS, or app store, is one that assumes you are not individually a target. This means you trust Apple/Google and US/EU. I do

The scenario that merits trusting the OS, or app store, is one that assumes you are not individually a target. This means you trust Apple/Google and US/EU. I don't know, I could see there being reason for scenarios that fit this use case but have trouble bringing any to mind other than making fun with crytpo to feel better about yourself, or just muddy the lines for the FBI. If you're an activist, most definitely you fall outside this scenario and shouldn't be using these phones.