This bothers me more than it should.
It should be called the decoupler pedal because that’s what it actually does.
Not all IC engines, but all gasoline ones.
Diesel engines are really more like colloquial term gas pedal, the more you push, the more the injector pumps dispense. That’s what m makes diesels more efficient (no pumping losses like a gasoline engine.
Unfortunately they are dirty as hell.