Why is parking free? I thought they wanted to mini...

Why is parking free? I thought they wanted to minimise the amount of carbon emitted from the site, but the place is surrounded by giant car parks! The cost of parking is included in the ticket price, so someone who walks is still charged for car parking, and someone who comes on the bus is charged twice for their transport!
I thought the project itself was really good and I agree completely with the environmental message they give, that we need to reduce our carbon footprint, otherwise we're all in trouble. But the hypocrisy in encouraging people to drive to the site was hard to ignore. They should charge for parking and reduce ticket prices by the cost of the car park charge. They also need to put in a decent bus, walking and cycle link to the site. As of September 2020 there was no bus and to walk or cycle you're on a rocky or muddy path, or going down narrow national speed limit roads.