Earlier quoted context omitted.
They're not arguing against free parking, just against regulations that require certain amounts of parking to be built
Unfortunately insufficient parking is also a big issues; one in which these regulations are an attempt to solve. One could prevent less parking to be built but that would put more pressure on public roads. If you've ever been to an area with insufficient parking, it's pretty horrible. More so for people with cars but it affects those without cars as well.
Come to Tokyo, you'll see how well things work with effectively no parking in general.