The distinction is quite easy to make:

X to Y: "Hey, you sound like a sheep."

Y: "Oh really? Please tell me more, why do you think that?"

Y gets new perspective and might grow.

Versus...

X to Z: "Hey, you sound like a sheep."

Z: "I'm not into conspiracy theories, can we change the subject?"

And yes.... if X is still running after fiat money, brushes his teeth with fluoride tooth paste or takes anti-biotics etc, X is indeed part of another shepherds flock.