This is absolutely true. But...as I've said here for years...what about the girls? Yes, I know girls can be plumbers, electricians, welders, etc. but let's face it, most do not want to take on that kind of work. My husband is in the trades and it's been wonderful. He's been in for 25 years. The number of women has not increased and they aren't really interested.
My daughter was one of these college kids who probably shouldn't have been there but she did make it through. But she needs a "trade" but not sure what that is for a woman. Hairstylist? Nothing wrong with that but certainly not as lucrative or "safe" as the male dominated trades are.
First, to address the bolded: yes, they are interested, and many are perfectly capable, but as the daughter of a carpenter who knows how the trades work, the answer is that they lack real opportunities. Sexism is VERY alive and well in the trades, and unless you have a skin thicker than a rhino, that will usually wear you down enough to quit before you even finish the classes, assuming that in your area the union doesn't have a lock on access to the classes (which means that you need the recommendation of a member to get into them, and very few of those will go to women when members are pressured to give them to other members' sons/brothers/grandsons instead. And if you finally do finish the classes and need to get into the union to get an apprenticeship, the old-boy network will probably shut you out again. There are fewer organizational roadblocks to women in right-to-work states, but the sexism is still there. IME, most women who manage to successfully enter the trades are related to contractors; they work in the family business and come up that way, with double the usual amount of hands-on experience under their belts, so that they can outperform the men in their classes. (A man will be asuumed to be competent unless he royally screws up and proves he isn't, while a woman will be assumed to be incompetent until she proves beyond a shadow of a doubt that she not only knows what she is doing, but is REALLY good at it.)
Now then: if you are looking for a "trade" that doesn't involve outdoor physical labor, there are quite a lot of possibilities, most commonly in allied health occupations. Just look at the catalog for any community college for quite a few cerfification programs. Most of them start out fairly low-paid, but have very solid advancement opportunities, especially for someone who manages to earn a bachelor's along the way -- in ANY subject.
Oh, and I'll second what the teacher up-thread said: in 99% of jobs, no one really cares where you earned your undergraduate degree. (There are a few high-end situations where it counts, mostly because of the implication that you made necessary social connections there: investment banking comes to mind.) What counts is that you finished it, and therefore possess the minimum job qualification. The other skills you bring to bear are much more important. For anyone who plans to enter a civil-service type job, such as teaching, social work, or law enforcement, a private school education is pretty much NEVER worth the cost unless you somehow get it for free.