He forgets the part where because of emissions requirements the C15 can't be driven in that scourge the people the author defends call "low emissions zones".
If you want to live in polluted areas there are plenty of places available on Earth for that, I believe most people would rather not. Low emissions zones are mostly in very densely populated areas where the impact of pollution is higher, not sure why you consider that a scourge. Could you expand on why?
Perhaps I'm a plumber going to work on a house in a LEZ? Perhaps I need to deliver something? Perhaps deliver to the airport (!) inside the LEZ.
There are all kinds of reasons why someone might need to take a van into an LEZ, if you think for more than about quarter a second.
This is primarily a reason why you shouldn't drive a vehicle from the 1970s, as the article suggests, and why LEZs need practicality not to drive service inflation inside the area.