The fact that you make do with that doesn't mean everyone will make do or would like to bike versus driving. That is the whole point: let people use whatever is more comfortable for them.
"Driving" is not a neutral thing that falls from the sky. I know it seems like it, so much our society is structured around transportation by personal automobile.
But you need roads. It's a choice whether to make it e.g. 1 part car lane, 1 part bike lane, 1 part bus/tram lane, 1 part pedestrians, or flatten the whole thing to make space for cars.
Not to mention parking, pollution, the deaths and maimings, and the million other externalities.
