Posting blind.....

Because offsuit hands suck unless they're high. You could very well have to hit your hand twice, and you don't hit your hand well or make a straight often enough to make the 7-1 odds worthwhile.

The K4o hand is fairly simple. You almost never have more than one overcard to a steal range. It's usually either an over/under (when you're ahead) to two middles...or you're beat/dominated. The times you are ahead, you're only a 60/40 favorite and your hand plays terribly OOP against any semi-decent stealer.

If you don't believe me about the offsuit hands, go to pokerpatterns and run a graph filtered only for non-pocketpair offsuit hands.