[Nasrudith]

If people were purely economically rational actors, maybe. If they own a home they already have adequate transportation for themselves 99% of the time (only exceptions I am aware of are aging suburban populace who can no longer drive) and often don't want to pay for what they don't need or believe the expense will be greater than the gain. Maybe if traffic reaches a critical mass such that transit becomes the quicker option and roads aren't remotely viable.

Second there is an all too common ugly undercurrent of bigotry viewing it as bringing "undesirables" that they worry will lower it or negatively effect their lifestyle.