I want to question why Twilight can't do the same sort of amazing things as Rarity with her magic, but I can't deny that Rarity is more dexterous.



I could also point out that with Twilight's strength she could do a lot of damage pretty easily if her magic slipped, but given the sort of stories you hear occasionally about people getting their nethers in improbable trouble I gather that some people wouldn't mind the risk.