Because they have no actual proof of it, and direct evidence against it. They talk about phones communicating with each other to restart… yet a phone inside a faraday box restarted.
It’s almost certainly just a software bug in iOS which is why it’s inconsistent.
And then you’re stuck constantly reminding every family member which app to use on which device when they come to you because they’re getting ads or something isn’t working right.
For a single power use that’s fine, for a family with kids, it’s nearly impossible without going crazy and killing them.