If it did not affect the health or well being of pups or bitch I absolutely would. For example, if you kept a litter size down for a bitch that can't handle a larger litter you would be doing her a service. There a alot of ways to look at this question.
if it were afforable? no question. yes I would do it.
My goal is to produce for my breeding program, not to sell to the public. if I were looking for a particular sex and color, that is what I would arrange, less puppies and families to deal with.
then you have to look at the flip side of the coin, as in planning larger litters with little or no regard for the dam and her pups.
there are always trade offs in life and there will always be some that would use the technology in very different way then it was intended.
Sure why not. I think knowing and deciding on only the 1-2 dogs you want to keep would certainly be easier then puppy interviews for a litter of 10. The risk is what if they don't turn out. You certainly have more odds in your favor if you have a larger litter i.e. more to choose from but I'm in, hey, can we choose eye colour as well??