dude, why would you hold back when you could be the best in the world by far...i'm sure kaya isnt worried about getting too much product. thats the least of her worries.
and sarah hasnt done her 10 because she has only done a few 10s. the majority of people that do big tricks, guys included, practice them a shitload. its like saying why hasnt walter wood done his 16 in the pipe. cuz hes only done a few, if that. you need your shit consistent for contests. thats why you dont see jacob going dub rodeo 9, to switch dub 9, to dub 12 in slope contests. he'd be more consistent with doing simpler tricks. theres only been 2 dubs in a line in one contest. bobby brown dew tour, and, as he explains, it was a huge risk.
you cant tell me every girl in the world isnt trying at all and they are just taking it easy because they dont want to be rich and have too much product. watch them ski in contests, they are focused, and trying.