Earlier quoted context omitted.
Not all data points are useful. Different pools have different profitability advertised in different ways. Some highly useful data is hard to get directly or requires significant and/or stealthy spend.
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Advertising isn't an inherent evil. You find your mechanic, doctor, lawyer, etc because they advertise.
I advertised for one specific company. I worked in an industry that was pretty grey. Some parts of the business were vaguely predatory and others served a great public social need. More importantly, you had to have an actual reason to fill out our forms and follow through with us. We weren't just desperately trying to get any eyeballs. The work that I did very much did help people.
Also you're not going to get much mileage shaming people for what they do for a living. You being reductive doesn't really reflect reality either. I was much more than some marketer and yes, the problems were extremely intellectually stimulating, otherwise I wouldn't have been there.
That's better than I can say for most of the quants I worked with -- they were almost all just in it for the money.