I suspect most graffiti doesn't actually have this twisted motivation. It's just selfishness by thoughtless people wanting to advertise themselves, like dogs marking their territory. This intellectual rationalisation is more of a projection by resentful people with a poisonous worldview.

Do you believe you're giving graffiti artists even a thimbleful of good faith by comparing them to dogs?

I think you may have agreed with them a long time ago, when you chose your username. Have you perhaps become wealthier, in the interim?

Commentary is graffiti. We're all selfish dogs marking our territory, advertising that we exist.