Three different control parameters that get talked about like they're one dial marked "sensitivity." They aren't.
Ask someone to "tighten up" a zone that's swinging too far from setpoint, and they'll often reach for whichever of these three terms they heard most recently — without stopping to check which one actually applies to the control scheme in front of them. That mix-up is easy to make and genuinely consequential: a setpoint is simply the target value, a deadband is a no-action zone that only makes sense for on/off (two-position) control, and a throttling range is a proportional response curve that only makes sense for modulating control. Widening the wrong one doesn't just fail to help — it can make the loop behave nothing like what was intended.