Maybe I should rephrase. It's an art to go fast and not fall over the bumps (in that case the skis ride you, to put it in Sarj's words). In order to stop and change direction, then yes I'll have to make some turns. It's not that I never turn.
And black slopes are an entirely different thing. Obviously I don't go down those without turning. To be honest, I don't really like black runs, exactly because you can't go that fast on them. I've seen skiers tackle 'em without any effort, but I'm not that good. As I said, I'm more of a recreational skier. I prefer slopes that, when going down, almost make me feel the pain I'd be in should I fall. It feels awesome when you survive moments like that unscathed. That's pushing your limits, see how far you can go.
I started when I was 10, once a year. 2 years ago I started snowblading, and going twice a year (have done it 4 times since then, and getting better and better at it). I'm 20 now, so you do the maths.