At the risk of injecting some facts into this exciting debate,
I would like to point towards the commuting to work and business travel survey by the Office of National Statistics.
Some interesting things arise from this small factsheet.
1)
Average commuting distance is 8.6 miles to work in 2009. This is average, and makes me wonder how many car journeys are made which are less than 5 miles.
2) The higher your income the higher the commute distance
3) Around 40% of commutes under 2 miles are made in the car, around 75% under 5 miles are made in the car, as are 5-10 mile commutes. Long commutes over 50 miles have less proportion using the car as people start to use the trains instead and this becomes a significant modal share.
4) 85% of commutes in cars involve single occupancy.
Now just these smattering of facts seems to point to quite a lot of potential choices for a pretty significant number of commute journeys. It also indicates that those doing long commutes aren't normally the poorest in society - which is common sense when one thinks about it since, for the poorest, it is very unlikely that a long expensive commute by train is worth their while, or that they will have the funds to buy a car in the first place.
Many people have choices. Many people prefer the narrative that they don't have a choice in order to justify their choice.