Whether the opinion unpopular or not, I think it's very incorrect.

Because you can point out memes that *are* group signaling, doesn't mean memes are universally this or even that it predominately operates this way. Memes are a medium which forces one to breakdown ideas into their most concise form. They will have the same scope of correctness, painfully wrong, mindless group signaling, etc as literally the concept of "ideas" itself.

ie. you might as well say "ideas are just group signaling to breed tribalism."