Well behaved children are almost never a problem.
&&&
And that is the crux of the matter. Too few parents today take the time to teach their children how to behave.
They live in a “Cryocracy”. It is rather pitiful to see.
Some friends of my dad asked how it was that my brother and I (notoriously bad kids) listened to him and were (comparatively) well behaved. He said “I laugh at them when they cry and don't give them what they want.”.
They said they would give it a try - but after 10 minutes of crying in the car because they wouldn't stop at McDonald's - they gave in. My dad observed “next time you will have to go 20 minutes at least - they know your breaking point.”
They never did train the child. The child trained them.
Pitiful parenting.