No try biking up that hill without friction you can expend infinite effort but without friction you'll not get anywhere. The tire will spin and spin but with no

No try biking up that hill without friction you can expend infinite effort but without friction you'll not get anywhere. The tire will spin and spin but with no friction you'd have no forward force applied. That is if you muscles could work without friction that might work but the spining of the chain and all the other details don't work without friction. But I think at a more personal level truly learning and having that learning last happened because friction not because it was effortless. I honestly don't remember much about things that were effortless. Things that don't take effort can't show you what your doing wrong because it was effortless, there was no resistence to feel where you might be going wrong. I agree there is a optimal point of friction but minimization might not be that optimal point.