The placebo effect is explicitly a denial of the existence of whatever other explanation is offered (e.g., spells, prayers, or manifestation)

Spiritualists might not like being lumped in with the "law of effect" victim-blaming nutjobs

I suspect only a person who knows literally nothing about quantum theory or research could casually suggest that spiritual phenomena and the placebo effect are the same thing as "quantum physics" (maybe they mean entanglement? Or maybe the meme creator just thinks "quantum physics" is a big, mysterious thing so obviously it's the same as everything else they don't understand)

No, everyone's not arguing over its name. We disagree on whether the phenomena exist in the first place, and this heterogeneous list doesn't change that.

If you don't try to cram at least 3 qualitatively very different kinds of things together, then yes, plenty of people (maybe a majority of humans) deny the existence of one or more of these items.