I spent like 8 months working for a company that specialized in home HVAC contracting advertisement. I'm not going to say the best minds of our generation were working on this particular problem, but still. What a fucking waste of human life.

Think about this market. People need air conditioning services. They're going to get air conditioning services. The only real question is which service operators get their business. It's zero sum. Every cent spent on marketing is valuable to individual businesses, costs other businesses. Marketing and adtech are necessary as part of an arms race, but it's net loss for the world. You're just spending money on market conflict. That company has produced nothing of value: they only attempt to divert flows of money from some people to other people, entirely independent of merit or value provided.