It's not topspin vs slice, or topspin vs less topspin.
It's all about where you hit the ball with the strokes you use.
There was a time they thought slice gave the best placements.
There was a time they thought topspin was only wild and a waste of energy.
There was a time they figured out topspin can be tamed with practice and bigger rackets.
There was a time they figured the grips to use with heavy topspin.
There is a time they figured the grips for heavy topspin aren't nearly idea for volleying.
But all this time, through all the different idealogy, we knew good placement beats hitting up the middle.