"Because you're one of the strongest people in the Force I've ever met, despite your age and lack of training. Training will only bring things to the fore even more. That said, the amount of raw power available will probably make doing things that require finesse... interesting. Put mildly." He's not going to worry about the things that require fine control for a while. First, there comes getting Anakin able to do some of the more obvious and big things.