That's probably great advice for those born with a silver spoon.
How does he propose common folk get to work and back with no car for 5 to 7 years while they save for a cash purchase?
Not everyone has access to reliable public transportation. And not everyone can make public transportation work for their jobs even if they do have access.
This is honestly the most preposterous "advice" I've ever heard, there is a reason that nobody but the 1% do it this way.
You don't need a silver spoon to buy a beater that'll move you from point A to B and back again.
What's preposterous is painting it as though you need to save for years to buy a vehicle with cash.