It's his preference, that's all. Men and women are more free now to choose what they want. It's incumbent on him to find a mate with an aligned world view and similar goals and values.
This is incumbent on everyone. Women have more choices now than ever. That's a good thing. Men have more choices than ever, too. That's perfectly legitimate and fair.
There are enough people to go around so that everyone should be happy. If not, some of those people have to re-evaluate what they want. That's normal - just as he may have to re-evaluate, you may have to re-evaluate, too.
Everyone should wind up with a desirable outcome, or at the very least a deserved outcome.
It also seems to be fairly sexist, and it hurts me to know that women out there are willing to tolerate such sexism.