Quick question - is it really necessary to buy that valve core screwdriver/driver to properly torque the valve core in the stem?

I don't mind spending $25 in the screwdriver tool from Lisle. Just curious if it is really necessary, as long as you don't overtorque/strip the stem.

Any tips or advice when changing out tires with rims that have TPS valve stems? I don't see alot of these come into my shop.