No it isn't. Under evolutionary theory, man decides nothing. Mother Nature decides everything. A process driven by man is artifical; contrary to nature. It is the opposite of natural selection--it is unnatural selection.
Those who can out compete. Those who cant, die.
True, the ability to compete is part of what drives selection. But it is not the only factor. It is more useful to think in terms of suitability for a particular environment. For example, imagine a person who is a great competitor. But if he has a condition that makes him unable to tolerate weather conditions during part of the year where he is living, he will not be well suited to that environment, and unless he can migrate, he is at high risk of being selected out. By nature. Not by man. That's natural selection.
Human children are completely helpless. If people decide they are unfit, they are unfit and do not get resources. That’s evolution; it doesn’t matter that we are smart. It’s still all about fitness and competition for resources. You don’t make your parents happy, you don’t pass your genes along.