I really hate whenever I try to explain how some bad rules can be abused and immediatelly get someone say shit like "If this happens in your group, change it" as if that would solve the problem. And whenever it is not soemthing you witnessed personally, then it means it never happens and could never happen.
This has a lot of "stop enjoying that!" energy.
There's no set of rules that a clever person can't exploit or circumvent in some way, and min/maxers have been a plague on the RPG community since long before 5e. Frankly, if this sort of thing is a regular issue for you then the problem is the people you're playing with. A good DM can roll with players like this and balance them.
oh hey it's that box from the chart. d&d is saved!