When everything's coming your way, you're in the wrong lane

Every time I get into a car I can't stop thinking about this scene from Clueless (from about 0.40) 

I've just started having driving lessons, about 4 years too late. I really want to pass this Summer before I leave again for work, just as long as my driving test goes nothing like that! Even though I haven't really got the hang of it yet, I absolutely love it! Although I was a bit naive in thinking it wouldn't be as hard as it is.

I'll be off the road for 3 weeks while I'm in the US but I hope I don't forget it! I've been watching everyone's driving so closely recently, and already getting into arguments about the fact that I am learning differently to the way they drive! The current issue is that my instructor tries to have me with 1 hand on the wheel as often as possible, as you "don't need two to steer" - no one else seems to agree though! Please tell me someone else has heard of this technique!?