It's in Apple's interest to optimize their transportation situation. Because Apple built the absolute minimum amount of parking, it seems to indicate that Apple thinks less parking than that is necessary for optimal performance.

Instead of investing money in parking, they could have spent that money on private buses, public bus passes for employees, bike parking, bike subsidies, Uber subsidies, sponsored carpools, bike paths, or nearby high density corporate housing.

As for freeway capacity, if we reduce free parking, that will cause less people to drive, making the freeways more clear.