> What I take issue with is the lack of symmetry.

I think symmetry in this case would amount to false balance. Why even bother to frame things this way? It's self evident to most people that crank views run the gamut of social and political backgrounds; like all things in life, we prioritize our discussion of them by their perceived impact(s) on our lives. COVID denialism has more of an impact on my life than an anti-nuclear crank does.