It would not take just 15 minutes by car, it would take another ten to park, but also if one person takes their car, how can they ask other people not to as well. It will take 30 minutes to driver now, and there won’t be parking as everyone drove.

Now upzone the city, oh dear it’s utter gridlock.

Edit: but actually forbidding the building of parking is just as misguided as requiring it. Did not initially see that it was actually proposed to be prohibited rather than simply not required.