yes I agree there is a range of STOL Aircraft but they have approved techniques in the POH to do their STOL landings with P charts to suit.
I don't see anything in the certification standards for civil STOL. Can you post some specific POH technique words and a P chart or two to support your contention ? I'm only too happy to learn something new ...
Now, what an operator with a need might choose to do is another story altogether ... then it becomes an interest for the Regulator and the insurer.
Military is a different arena.