It would be very possible to make the UV measuring tool that would work for both locations if the spec would be clearly defined; in the case of the Xbox control

It would be very possible to make the UV measuring tool that would work for both locations if the spec would be clearly defined; in the case of the Xbox controller you still need to adhere to some kind of a median value when it comes to ergonomics. Both your examples are a case of design issues to which diversity is only one of the solutions available with no real guarantee that it will work.