For the vast majority of city dwellers, they are there either because 1) they grew up there and that's where most of their social connections are, or 2) that's where the jobs are. The reason why cities even grew to the size in the first place is because of the economics of the Industrial Revolution - and, in some places like the USSR, deliberate policies to force the rural population into the cities to man all those factories. We don't actually know the real preferences until those factors are out of the equation.