People do have other values ya know, so what if many dont have a bulletproof parnasa,. Most are still happy, even with many kids, they have what some lack: The correct prospective, Bitachon, and the realization that it wont matter if you were a dentist or an insurance salesman in 50 years.
It's more that it's just chaval many times when you see young people who've been marries a couple years, starting to realize they wish they had something in their hands in terms of Parnassah.
I have a friend whose father is a doctor and all his kids were the typical learning yeshivish guys and now he asks his father all the time why he didn't encourage him to get a degree etc. when he was younger.
And I talk to a lot of guys who wish they had taken the time when they were young to get a degree.
On the same note a friend of mine took a few years to go to school part time and get his degree in accounting and then went back to Yeshiva full time and when it came to shidduchim had to deal with MANY responses of girls saying no "because he went to school" - and this was a really good guy, a really good learner.
It's hard in our society with social pressures. Even guys who might like to do something feel they can't sometimes.