Modern women who aren't traditional wives offer the exact same thing as men.
People, both men and women can self-motivate to achieve things and not depend on a partner to constantly having to push them and "bribe" them to live their lives.
Sure, it is great to find someone who would support you and celebrate you. But that goes both ways.
I mean, what incentives are offering men to women so they became doctors, engineers, or anything else? Because now many women are doing that while single. And many men are also able to do those things not only being single, but without the "carrot" of finding a wife.
Also, as others have pointed out, women have also created technology upgrades and inventions. And there are also gays among the men who have invented things. Newton for example.
So this idea that women should serve men to "motivate them"? Sorry but no. If men can't self motivate, then others would take their place.