Nature has been doing a pretty good job of selecting for warriors already...

It's not about designer babies for the wealthy. All humans reproduce using genes. All humans are going to need to husband their genes. What we call human progress is the removal of natural selection. No species can survive that. We need to replace the natural selection with a wiser, far more efficient form of human selection that can select against the de novo mutations (broken genes) that occur each generation and select for the best genes of both parents. check out this older video and see if you find ethical or genetic problems with it. https://www.youtube.com/watch?v=wjVieFKevMk