Banning “marketing” in general is impossible. In order for humans to survive, we need to acquire means of sustenance. With social division of labor, you cannot acquire all the means of sustenance you need by yourself or within your immediate community. As such, a market is necessary to exchange commodities, including means of sustenance and means of production, and the mere act of bringing a commodity to a market is, by definition, marketing.

Banning advertising in general is more possible, but probably a bad idea. Imagine you want to buy bread. How would you go about that? Look for a “bakery” sign? Whoops, that’s advertising, can’t have that. Your best bet then is, like, going into every single open door on the street until you find a bakery, which doesn’t sound good at all.

What we should do is regulate advertising down to its minimum necessary function, which is helping people find what they are already looking for, plus maybe PSA type of ads (e.g. reminding you to get vaccinated and stuff). So yeah, most modern ads should be banned, but some should be kept because there is some actual use in them.