yeah, and you brought us the musings of that guy to say it.
It's simplistic nonsense. Cash is for not writing down transactions so you can avoid paying the taxes on it. Cashless has massive benefits, and regardless of how you feel about it, you live in a global economy with global supply chains, and if you want to bring it back, make things worth investing in.
Cashless has massive drawbacks. The biggest is being turned off at the press of a button by your government. Being hacked or a power outage is another.