I'm typing this from work -- I work at a B2B telecom in an inner-ring suburb of Dallas -- and all I have to do is look around the office and see lots and lots of white-collar professionals who live and work in the suburbs and have spouses and children, including everyone on my team (well, one guy on my team doesn't have kids, but he's married and owns a house in a conservative suburb). I remember when I used to sit next to the sales department, and some of them would talk about their kids all the time. Very few people live in the city, and some people in the more business-y departments have given me some very strange looks when I tell them I live in an inner-ring suburb that's only 15 minutes away; most of them live in distant exurbs and have fairly long commutes.
This is what the corporate world is like all across the country.
To answer specific points:
> Right, but now you're forced to get a new job in a new place, or at the very least have a very lengthy commute.
People change jobs all the time, and they typically get raises and promotions out of it
Oh, and having a long commute and spending lots of time at work is considered a bonus to many people who have kids. Work is the best way to get a breather from the screaming babies at home. You know the guy who's always super-excited and happy to be in the office at 8:00 Monday morning? He's obviously a father.
> Or worse, having to live in Texas?
I actually love living in Texas. I've lived here my entire life, and the only reason I'm even considering moving later this year is because of SB6, and even then I'm going out of my way to move to a suburban environment that reminds me of home (I've pretty much decided on Torrance, CA, though Orange County is still a backup).
> This of course assumes that there's even jobs for you in TX or other low-cost locations.
And it's not like Dallas doesn't have any tech industry. We're even called the Silicon Prairie: https://en.wikipedia.org/wiki/Silicon_Prairie
Dallas-Fort Worth-Arlington is the fourth largest metro area in the country, and Houston-The Woodlands-Sugar Land is the fifth-largest [0]. It's patently absurd to say there are no jobs here. Both metro areas individually (Dallas: 7.1M; Houston: 6.7M) are more populous than San Francisco-Oakland-Hayward (#11) and San Jose-Sunnyvale-Santa Clara (#35) combined (6.6M).
[0] https://en.wikipedia.org/wiki/List_of_Metropolitan_Statistic...