Without cash, you're giving the government the power to de-bank you and control what you can and can't spend your money on, even your ability to feed yourself.
In Canada, during COVID Lockdowns they prevented the unvaccinated from getting on planes or trains, or buses. And required truckers to get the shot to drive their trucks.
The truckers protested, so the government froze the protestor's accounts and many of those who that donated to them. So people started to give them cash so they can feed themselves and continue the protest.
Literally without cash, these people would be on the brink of bankruptcy and starvation.