Also made me think why in the country I live, in stores like 7Eleven you cannot pay with a credit card for gift cards, google pay cards, etc.
Create a very basic "game" that technically meets Valve's requirements. As long as it runs well enough then it won't be blocked. Have people buy Steam gift cards with cash, then buy the games you have published.
Valve takes 30% and you get a nice check with a verified source of funds from a legitimate company.
Granted, there are benefits to laundering money with literal cash, but you still want some legitimate money trail even if you don't actually hand over the claimed goods or services—enough at least to cover the actual expenses of the business, i'd presume.