That there exists more important issues to fix doesn’t mean that banning phones isn’t a good idea, it just means that there are prerequisites before it would actually work “in the real world” as you put it.

You’re willing to hold off on banning phones in the classroom until neglectful school staff are no longer an issue, then? Okay, that’s fine with me, but from what I’ve seen and heard of our schools and our cultural values around education, you’re going to be waiting a very long time.