I don't know what you are calling "good". That is a super loaded word. I would say it is effective though. The baseline evidence for that is how much money gets spent in that industry, I guess.
While I see your point, please note people actually spending money don't just look at how much money is in the industry. They have internal metrics and can track performance of individual marketing campaigns. I called it a baseline argument because I'm not a marketing expert so this it the only real KPI __I__ understand.
