Because when you're blasting six feet above the lip over a hip transfer no one gives a shit if you're doing something wierd with your hands. It's not the same thing as doing a nollie flip crook on a ledge. You can't compare the two and say, "oh this guy did a perfect nollie flip crook, but this other dude rolled out kind sketchy on this huge transfer, first guy has better style"... just doesn't work.
Cards is just too fucking gnarly to try and down play him over some stupid shit like looking a little weird before he sets up. However, if someone is doing nothing but skating a ledge, then yea they're open to scrutiny, because if they aren't making that shit look good then there's really no redeeming quality to that kind of skating.
Feel me?