[philipov]

No, it's very much used to express the sentiment "I don't care about this, and wish people would stop talking about it."

[monooso]

That's your interpretation, and there's nothing in the original statement to support it.

You're welcome to your opinion, of course. Just don't project it onto others.

[vthriller]

...which could also be a PTSD-esque reaction and not a sign of ignorance. As in "I'm so tired of being affected by this nonsense, when this would even stop".

People who don't really care would, in my experience, use sarcastic tone more often.