Whether children have washed hair or not doesn't really bother me but what I do know is that there are people who never wash their hair, one of whom I know well, and he has the most beautiful hair you'll ever see.
The shampoo you received didn't come from the universe but from someone who wants to sell you this stuff. It has nothing to do with a universe following our wishes. The universe does actually have more important things to do.
If you get my point!!!