I think the point of this comment was to distinguish the interaction on desktop (hover) versus mobile (click). Desktop users are used to hovering on stuff to s

I think the point of this comment was to distinguish the interaction on desktop (hover) versus mobile (click). Desktop users are used to hovering on stuff to see what happens. You can't do that on mobile so you have to do something else (click) which is kind of counter-intuitive on mobile (clicks are supposed to navigate).