rather, inward skate, inward pull, happens naturally for any pivoted arm, on any smooth surface, no groove needed to make/see it happen.
anti-skate, which we apply, counters the natural force
you want your stylus ’floating’, so it drops down into the groove and reacts equally to input from either side of the groove as well as up and down. getting the most of advanced stylus, further down in the groove, depends on proper countering of the naturally occurring inward skate.
preventing an advanced stylus from damaging grooves, from uneven wear of itself, to get the 'potential' longer life, based on straight and proper even l/r surface contact