Anyone claiming that they've plateaued or maxed out their skiing potential due to their height is making excuses and is more likely a pussy, lazy, or just not all that athletically gifted...apart from their height entirely.
Anyone claiming that being small and compact is not something of a natural advantage in efforts to get really good at spinny flippys of any kind—with or without skis attached to your feet—is just wrong and is ignoring both the existence of physics and asians.
Think about buildings....or fucking Jenga. The taller you are, any/all instances of being out of position (say front or backseat for example) are going to be exaggerated relative to a smaller person (center of gravity). Is there a significant enough difference between a guy who's 5'9" and a guy who's 6'2" for that to be a contributing factor to any disparity in their respective abilities? I sincerely doubt it. Now, if one guy is 5'6" and the other is 6'5"....probably. The true test is that if you were set on becoming a pro flippyspin skier....which frame would you rather start with?
All that aside, I can think of a dozen or so notable pros who are not just tall, but rather exceptionally-ish tall. Liam, Spriggs, Martini, Hatveit, Delorme, Collins, and Dumont all come to mind immediately.
Having fun at skiing's expense since '09.