We don't just have "bullshit jobs" (which is an actual term these days), we have a "bullshit economy" as well - centered around advertising because without advertising most of the bullshit just wouldn't sell.
Like, if you already got a car, you can drive it for 10-20 years easily, or more if you take well care of it. But advertising makes you think you "need" a new car every few years... because that keeps the economy alive. You buy a car and sell the old one to someone else who can't afford a new car but also wants a new one, so their old car goes off to Africa or whatever to be repaired until truly unrepairable. But other than the buyer in Africa who actually needed a new car, neither you nor the guy who bought your old car would have needed a car. And cars are a massive industry that employs many millions of people worldwide - so if you'd ban advertising for cars, suddenly the bubble would pop and you'd probably have a fifth of the size remaining, and most of it from China because the people in Africa can't afford what a brand new Western made car costs.
Or Temu, Shein, Alibaba and godknowswhat other dropshipping scammers. Utter trash that gets sold there, but advertising pushes people to buy the trash, wear it two times and then toss it.
A giant fucking waste of resources because our worldwide economy is based on the dung theory of infinite growth. It has worked out for the last two, three centuries - but it is starting to show its cracks, with the planet itself being barely able to support human life any more as a result of all that resource consumption, or with the economy and the public sector being blown up by "bullshit jobs".
We need to drastically reform the entire way we want to live as a species, but unfortunately the changes would hurt too many rich and influential people, so the can gets kicked ever further down the road - until eventually, in a few decades, our kids are gonna be the ones inevitably screwed.