Earlier quoted context omitted.
The cost of “free” parking is added to the prices the store charges. It’s better to unbundle these costs — an urban parking space can cost over $50,000 to build. That’s not cheap, and will materially impact rents and the price consumers have to pay.
Why is it better to unbundle them? I don't see why a business or person would want the extra hassle of paying for parking separately. Like paying for event parking is one thing but paying to shop at a store is beyond silly. What is next paying to use the drive through?
The gist is that we use more parking than would be societally optimal because it's “free”, which really just means that non-drivers subsidize drivers. It would be like if every restaurant were expected to be all-you-can-eat: we'd societally consume more food than was optimal.