Child elements belonging to the same list
I'm talking about a list with no parent hierarchy other than the top level, why is it that each item in this list can have an item belonging to the same list as a child element?
I understand that this cannot be completely forbidden for compatibility reasons.
However, I think that there should be an option to prohibit this.
I don't want to be able to accidentally add a child element in the classic dashboard or New UX that belongs to the same list, even if I don't want to.
For example, if I want to add an item called "Middle-East and Africa" to the top list of the "Regions" hierarchy, I would like to restrict it to being added only to the bottom of "All Regions", not to the bottom of "Americas" or "Europe".
If I were to add "Canada" to the bottom layer of "Americas", I would create a list called "Country" and add it to this list.