And yet, every male teacher I ever had, grade school through college was happily married, with the exception of TAs and some post doctorates still focusing on research and whatnot.

I think you're wrong here. Men in lower paying civil type jobs that align with kids' schedules and are stable are getting married.

It's the low paying, high stress, long hours, and comes with a man culture jobs that are being disregarded. And it's because of those two big issues that make mother's lives a living hell.