Btw. what exactly is bothering you?
I don't feel that mouse wheel should be pressed down at all. Feel the same about pressing down control sticks on modern controllers (Xbox etc.) - the construction is too fragile and unreliable to be used in such a way on the regular basis. Felt that from the first time I've pressed down mouse wheel and control stick years ago (how long its a standard, 10+ years maybe?). And a year ago I've broken the wheel on my deathadder 2013, a reassuring case for my skepticism.
Also I know that people who use middle mouse button to drag map do find it troublesome, at times.
I can solve the problem be making extra mouse buttons (4-6) behave like mouse 3 so it's a minor inconvenience.