The biggest weakness of a slice is passing shots. If you have a hole in your game, e.g. high bh, good players will find it and pound it all day.
A slice doesn't dip, therefore the passing angles are much narrower, and the ball is easier for the net guy to handle... mostly a straight in straight out type of shot.
the topspin shot, with today's racket and string, can have a crazy dip down to the net man's feet.. Because the bh loading with the ISR is deeper than the ESR loading of the fh, the 1hbh actually should have more spin than the fh.... hitting a high ball down, combined with the spin, this can make the net man feel like this ball is dropping straight down on him... not a easy ball to handle.
One of the "watch next" videos that came up after this finished was a video called "intercourse" with mature content. A french artsy short. Highly related to your BH ROS winners, the internet knows sex appeal and it comes in the form of a 1hbh
I think the more variation of shots you have in your arsenal the better, you don't want to always follow the same patterns as it will make it easier for your opponent to read your game. Just to add, heavy topspin is not easy to attack.