Proper maintenance of the wheels has the result of making a vehicle safer, more reliable, and less expensive to own.
Spline maintenance is easy enough, although it is somewhat messy.
Mechanics tend to avoid it because it's also rather time consuming, hence it becomes the responsibility of the owner. First, the wheel nut is removed, and if possible, the wheel itself. Having done this, jack up the car again and further attempt to remove the wheel. If neither method works, the wheel and hub are probably too perished to use anyway, and the wheel will have to be torched off. After removing the wheel, the splines should be thoroughly cleaned with solvent and a wire brush.