There can be some truth to that depending on who and where you race. Mod does also showcase driver skill. But it also costs 4 times as much just to get into.
Our spec class as I mentioned also does that and we don't have too many cheaters, just a good group of racers. Hasn't been a problem and it's ALL driver still. True rewards when you can hit the perfect line and you know it was all you. Driving a slow car fast builds skill.