Is it though? It sounds nice when you say it, but that's not very smart.Cash is king people!
Would you buy a house with cash? Plenty of banks are willing to lend us $100s of thousands at ~2-3%
Why would you spend cash when you can pay off your credit card each cycle and get 2 - 2.5% cash back without lifting a finger?
Do you save all of your money in cash? We're at an annualized 5% inflation, so next year your $100 will only feel like ~95 today. Why not put your money into i-bonds and get paid the rate of inflation at a minimum?
It's just terrible advice to tell people cash is king for everyday situations.