As you can see below Kenchar I never mentioned race 'class', so there is nothing to disagree with. A "poor betting race" has nothing to do with class.

"I think punters shoot themselves in the foot a lot through betting on far too many poor betting races [compulsive punting]. If punters put as much effort into selecting the races to bet on as they put into selecting a runner to back, they would be well on the way to profitable punting. We can be our own worst enemy and the biggest barrier to long term profit."

A group 1 might be a poor race to bet on and a class 1 might be a good betting race. It all depends on the race. Yes, I do have my race class and distance preferences but among those I carefully choose which of them I think are betable races. Regardless of what class or race distance any punter preferes to bet on, some are going to be good betting propositions and others should be left well alone as dogs.