[Kameron8]

That's exactly the point: there's absolutely zero reason to dispel the buff for the damaging effect.

The knockback has marginal circumstantial value, but the fact that it needs to be double tapped to dispel the buff is what makes it difficult to reapply over and over. It actively hurts the power level of the spell, which I have very little issue with on account of how much evade it can tack on.