that part is true as jumping and kicking isnt as or even really important in shoot out/pushout.
but also in pushout you play your opponent more. you leave him shots that he is weak at and maybe are better ones for you. strategy comes into play, rather than the ability to run balls being the only dominant thing that wins the games.
but in pool almost every game including one pocket if the shooter is significantly better than his opponent he will win as well.
in one pocket, and pushout nine ball, if both players are "close" in shooting skills, the smarter and more cunning player edges out the win.
in texas the best shooter is always the favorite. that is why i believe few will play 9 ball anymore for decent money as its easy to tell who the better shooting player is, but not so easy to tell who is smarter.
as most can see i look at it from the gambling matching up side, not from tournaments. so my views are skewed in that direction.