As a "marketer" myself, I've always had a lot of limiting beliefs when it comes to the ethics of selling. Sure, a lot of marketing is hogwash -- however, what's come to help me is reframing marketing into a way of true service. If you have a genuinely good product or service, marketing is just a tool to HELP people. Sure, there is an exchange of money there, but it helps everyone in the end.
RE: Yes, marketers sell us shit we don't need. Deal with it.