I mean the solution really is a comprehensive permissions system, for an accessibility system that needs to read notifications you should be able to deny it network permissions and whitelist which app's notifications it's allowed to read
entirely agreed, but in the context of this thread that means you just have to convince someone to enable it for the one app, rather than the phone as a whole. which doesn't seem to help at all with the coercion scenario (if anything that might make it safer-sounding and therefore easier), just under normal use / to limit possibly-malicious apps.
