Sometimes forests need to be cleansed with fire to stay healthy.
I hate the idea that we need to project jobs, even if those jobs are significant net harms for society.
Advertisers, private health insurance, political fundraising. I will have no sympathy for the unemployed, should they lose their unethical jobs.
While I don't agree that all forms of advertising is about manufacturing demand (i.e. creating desire for stuff people don't really need), let's assume a significant portion of it is. The huge problem with "stopping this business model" is consumer markets are huge; it's $20T in the US alone, and I imagine a significant part of the whole ecosystem will implode if people only bought things they needed with cash the actually have.
Suggesting we move away from advertising is equivalent to going against the economic status quo. Not saying there's no merit to this (e.g. we can argue the impact on the environment), but it's an incredibly uphill battle.