to some extend the 80 mile commute is being subsidized (roads, artificially lower gas prices, cost of congestion, pollution, sufficient space for parking at dense destinations, etc)
I'm not saying there aren't tradeoffs, but you can't really assert that as a group we just have to accommodate 80 mile daily commutes for everyone and solve backwards from that.
Also, jobs come and go. Sometimes I'm working close to home, sometimes 40 miles East, sometimes 50 miles north. I guess this is the same for most people. Why move when you're just going to get laid off in a years time?
more broadly i think the US (whatever combination of govt and industry) has failed to provide well for the guy with a job that wants to invest in property and possibly to raise a family. even with two incomes.
as you say, the promise of job stability is looking increasingly illusory
the job market putting you in a position where you are killing time in traffic for 2+ hours a day is a pretty clear sign of that failure