I think boys starting school later is actually a wonderful idea - or at least having the option to. I have a son and a grandson who were both not ready at 5 years old.
But I think what was alarming to me about your article is thinking that women have any responsibility at all for the plight of young men. I understand that women refusing to be a crutch for men in general is going to cause some discomfort, but instead of blaming women for the problem, it's probably time to do some introspection on why we ever thought that was fair.
I have a lot of young men in my life. Sons who are 19 and 21. Two brothers in their 30's. Coworkers. They are all struggling. They all want partners - but mostly for the wrong reasons.
Instead of wondering what they can add to a woman's life through being her partner, they simply want to drain her of all her emotional and physical resources. That is exactly why women are opting out.
As a society we need to help address it, but I am more inclined to believe that the problem was letting men rely on women for so long and in so many ways to begin with, than that no longer allowing it is the issue.