'An actual good skier should be able to ski on a good ski and not pick out the flaws, dump them and then buy another one.'
that makes no sense at all.
First of all, are you defining 'good skiers' by how they can perform in the park/pipe, or actual skiing ability all over the hill?
You don't need good skis if all you do is play around in the park/pipe. In those scenarios, the only thing that matters is that there is something on your feet bringing you to the jump.
As for skiing all over the mountain, you do need good skis if you want to progress and get your skiing to a point where it is technically sound. Sure, you can do it on less than great skis, but they will only serve to slow down your progression. Saying you have shitty skis so you are a bad skier is a cop out of course, but it also does play a role in it.
The other side of the argument is that a shitty skier will be a shitty skier no matter what skis they are on.
'uhhh.... i figure since we will probably never meet then its okay to talk about balls. - Kamikaze