If digital advertising was banned and good journalism could be identified by "I have to pay a small amount for this", competition would drive the costs down in a way which makes proper use of that scalability, and we would all be better off.
I think modern professional journalism was a fluke of history. Without independent funding it's going right back to its original state. And the only way that independent funding will happen is with a highly educated and involved citizenry, which scares the living crap out of the powerful.
They don't give you the option to pay for an article. The only two choices are pay a couple hundred bucks for an annual subscription that you likely won't use more than a few times, or bypass the paywall.
To follow your analogy, this would be like if the gas station only sold gum in packs of 365 - you want a day's worth of gum, but you can only buy a yearly supply. I'll bet you'd see a lot more people stealing gum.