On reason I would be hesitant to marry a younger woman is because I would not want to kick the bucket and leave her in a position where she is alone for 25+ years
Of course, the obvious solution to that dilemma is to marry a woman so much younger than you that when you kick the bucket she is still young enough to enjoy your money and live the life she chooses with whatever kind of guy she chooses
Thats a problem with its own self solution
You could go the route of being a young woman's sugar daddy while she gets through college. She graduates and moves on, and you find another sugar baby in the fall.