I'm actually shocked to see that there are people that want immersion breaking mechanical equations, functions and logic gates thrown into their face. I agree with what you are saying but the perfect ruleset for this already exists in 5e and what you are seeing is Larian having taken liberties with the system, chosen to not implement it for whatever reason, or actively wants the presentation of their game to include these artificial arcade game features for whatever reason.
I don't presume to know how to solve this, I just think it is problematic as it is right now
