Clip points tend to penetrate to one side because the centerline of the tip is not on the blade axis. As for cutting on the back stroke, it takes more practice than the average user will bother to exercise, nullifying any advantage.
Great for Keating, not so good for daily use - the tip won't slide under material and allow cutting with the safe edge down. It takes a drop point to do that - clips are at a disadvantage, and why they are not as popular.
Knives with "tactical" or "SD" emphasis often have limitations that impair utility use. As there are rarely any SD encounters knife on knife, it's better to live with superior utility than suffer with imagined self defense capability.