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.
i mean, if youre wanting exploitative rule mechanics based on wording/interactions, you need to look no further than base first aid and medicine in CoC; You’re able to make 1 of each per wound you take. Unlike older editions, they’ve done away with the heal cap on it, so if you’re down HP, simply deal yourself 1 HP of damage, make a first aid check. and then make a medicine check to heal at minimum 2 HP. Repeat until full. You can easily reheal yourself to full this way, which is definitely “unintended” based on how healing works (and older editions).
Edit: at the end of the day, my point is that pretending other games cant or dont have exploitative mechanics/builds/whatever is naive at best? It’s not a D&D only problem. It’s just more prevalent in D&D because 1) it has more rules and 2) it has more players.
I think you’ve conflated part of those rules - there’s nothing in the medicine skill saying you can only do it once per wound, just first aid. So you can deal/restore 1 damage in between medicine checks, but that’s not what let’s you keep making medicine checks.