One does not exclude the other. While it is true that kids, as well as adults now we're at it, doesn't get enough sleep because of some weird protestant idea that it is morally virtuous to get up so early in the morning it causes you pain, it is also true that kids benefit from routines and that disrupting their circadian rhythm causes them to be tired and irritable the next day.

What about bedtimes that respects the individual needs of the child?