Not all games include a toggle at game level, making them unplayable for people with conditions such as RSI/carpal tunnel, where vibration causes physical pain.
It can also be problematic for people who may not have the controller in their hand (might just be there as an authentication controller or the host to other controls), as vibration causes the controller to move, and can also be a strong matter of preference for gamers who don’t face any impairment-related barriers.
A simple solution is to allow vibration to be disabled at a system level, or if possible, the level of haptic feedback to be adjustable. A more advanced solution would be to offer another means of communicating the feedback, for example a system level on-screen icon to show when haptic feedback is being used in a game.
System level vibration toggle on PS4