If you drive a larger vehicle, you are taking on the increased risk of hitting other children or your own children. Whether or not you've actually hit a child doesn't change that fact and trying to wiggle out of it through that logic is the same as arguing just because an irresponsible driver hasn't killed anyone means they're actually safer than an irresponsible driver who has. The fundamental attribution is their irresponsibility, not whether or not their irresponsibility has resulted in a consequence for them.

similarly, regardless of whether or not you've killed anyone with a larger vehicle, the fact is that larger vehicles pose a greater danger of running over children.