User blog comment:Zendarmanitan/Incinerator vs Superman/@comment-5889457-20140830075230/@comment-5889457-20140830160533

So those two controlled their power, or at least Gohan controlling his power made up for Cell not controlling his. I could give a rather decent argument of why Cell would want to control his power, given that their control is already near perfect in the first place.

The point is that they control their power so that significant collateral damage doesn't happen. The Z Fighters rather like the Earth they live on after all.

We could note that most of their Ki attacks create craters (as in, vaporise rock) rather than blowing ground away like a real kinetic impact.