Falling is something I have always considered part of skiing. It is rare I go a day without falling or having a very close call. I take all of these events and learn from them. I can I say I have probably learned the most from falling and looking back at what caused it. I would learn what the line was between making it and not making.
I see it all the time on the mountain how falling is viewed as very negative. Skis schools having the beer rule for falling in an instructors jacket. Kids bragging to each other how long it has been since they fell last. This is only going to hinder a persons progression I think. How do you know how far you can push yourself if you do not fall and find that line. I can't tell you how many skiers and boarders I see progress very slowly because they do not want to fall.
It is one thing to ski cautiously so you do not fall in terrain where falling means certain injury or death. It is another when falling means having to laugh at yourself as you pick yourself up out of the snow. I am usually laughing before I even hit the snow.