I agree that's what's most likely to bring you financial and reputational success, but I also think there are a lot of things people can and do sell that are various incarnations of snake oil, at best.

This perhaps gets a little philosophical, but: is it ethical to sell someone something they don't need, and doesn't actually help them, even if they believe they need it, and over time even believe they've been helped by it?

I think a lot of the applications of "AI" today can fall under that umbrella, given the "right" customer.