(I say this as someone who drives to work each day and parks on the street.)

Yes, think about the space taken up by parking, and the visual barrier it presents.

There's a shopping and restaurant strip between me and my office. The shop owners campaign for maximum street parking for the convenience of their customers, on top of the side-street and off-street parking behind most of their buildings. Yet at almost all hours, the entire strip is lined on both sides with cars to the point that anyone passing can't easily see shop windows, foot traffic, the social proof of people eating in a popular restaurant, etc. You just drive on through because it lacks appeal.

Think about a shopping centre and how open-air parking means that the complex takes up a huge amount of space and sets it all back so far from the road for anyone walking. If we took out parking allocations (or went with undercroft parking) and collapsed cities or filled in those areas with more "living" spaces, I think the result would be more appealing. Blocks could be more lively or smaller and more walkable.

There's some interesting stuff about parking here: http://www.cato-unbound.org/2011/04/04/donald-shoup/free-par...