I think this is really a false narrative - the college men's game is more competitive because the most talented players in the men's game are one and done, so they are less well coached and trained in the game, while the slightly less talented players are two or three years older, have been coached in the system for longer and have played with their teammates for those two or three years longer. A UCLA like program has no chance to develop and stock pile three years of talent into a single team in the modern men's college universe - imagine a Kentucky squad coming into this year with the following players - 2016 NBA draftees #7, #28, #34; 2015 draftees #1, 6, 12, 13, 44, 48; and 2014 #7, #17, and whatever freshman they have coming in. Because that is what Uconn brings to the court every year on the women's side, they dominate. And it isn't just the talent, but the training and teamwork that gets developed during those four years.
And the Olympic teams have similar issues:
Women - every top player who isn't injured is available every two years for Olympics/WC, and most try to make training camps a few times each year as well. Men - half of the top players are unavailable every two years, and I am not aware of them even trying to hold training camps prior to getting together the week before a WC or Olympics.
Women - 11 of 12 players have played on at least one WC or Olympic team and all have showed up for training camps in the last 4 years. 8 have been with the team since the 2010 WC when Geno started coaching, and 9 were on the last Olympic team. The only rookie to competition on the NT is EDD the reigning WNBA POY.
Men - to lazy to check, but I know they have less continuity.
I really don't think the men's competition in the world has gotten better than the women's competition - the USA still produces the best players regardless of gender and by a wide margin the most talent. But the approach to the NT for the two genders is just vastly different, and that produces a much tighter international competition.
The other issue that people mention all the time that really does have an effect is the nature of the men's pro (and college) game - it is predicated on individual superstar play. Some of that I think has to do with men sort of outgrowing the physical dimensions of the court, a lot has to do with individual talents being rewarded more than team performance, and a lot has to do with the training inherent in four years of college no longer being a part of the equation.
NB - I do not believe the NBA has ever had a foreign MVP - the WNBA has. And in the top 25 players of the last 20 years there would likely be fewer foreign players on the men's list than on the women's list. Just a small comparison of international talent.