I think squirrels get away better when you try to hit them. They are used to linear predators chasing them, and their leaps are effective getting away from that. A car trying not to hit them is something they’re not designed for. They freeze at the ambiguous threat and could leap anywhere.
So far so good. I have been driving using this theory for 8 years. No squirrels hit. Of course, the day this doesn't work I'm going to feel like crap.