Of course you are. You're selling connection or forward motion. You're selling a new way of thinking, a better place to work, a chance to make a difference. Or perhaps you're selling possibility, generosity or sheer hard work.
It might be that the selling you're doing costs time and effort, not money, but if you're trying to make change happen, then you're selling something.
If you're not trying to make things better, why are you here?
So sure, you're selling something.
Perhaps it would be more accurate to say, "I'm not selling something too aggressively, invading your space, stealing your attention and pushing you to do something that doesn't match your goals."
That's probably true. At least I hope it is.