You are absolutely correct.

I didn't think about it at the time when I wrote my response but there have been situations with mine where he has done things that cross personal boundaries, at his age it's more of him just being young enough to have that boundary himself but not understand that other people also have them.

Those were very quickly remedied by either explanation using his personal boundaries as an example or if that didn't work then acting as if we were going to do something that crossed his boundaries so that he understands in those situations that no is an acceptable response full stop.

I could definitely see where not handling those immediately could turn into an absolute nightmare.