The fact they think this shows they have no idea what they’re talking about.

This problem was solved when apple introduced ignore unknown callers.

They could improve on it slightly by allowing iOS apps access to breakthrough if they can prove its from an app somehow (like Uber or doordash), but really even that is an optimization not really needed.

For the phantom “what about my kid who’s phone is destroyed and is calling me from a strangers phone with seconds to live” you’d get the voicemail and multiple calls anyway.

That said, in recent years I’ve noticed a precipitous drop of these kinds of spam calls, so it may no longer be that big of an issue.