I'm probably communicating poorly. It's not that I hate math. Far from it. I think good game design requires strong math skills.
I just find that math during games makes them boring. The problem is the time it takes to do the math. In this case I'd have to look up the collision rules as well as follow a decision tree that includes lots of variables. Eliminating variables makes the rules go faster.
I'd rather see groups spending time creatively interpreting the Advantage/Threat on the dice than looking up rules. Maybe it's just me.