I'll be honest, I'm not a fan of that framing. Public opinion is only loosely correlated with the reduction of suffering.
There is an asymmetry for sure, but plenty of liberals also have incorrect beliefs -- liberal and left-wing NIMBYism comes to mind. It's really important to be evidence-driven and curious, and be willing to add complexity to your models as necessary.
Yes, I agree it's crudely framed and flawed. And other plentiful examples of left wing anti-evidence/expertise movements come from the "alternative medicine" arena. I think the problem with this moment in time is that factual accuracy takes expertise to curate. It's not something democratic processes generate. It's certainly not something you achieve with populism. So we've gone from "alternative facts" to.. "facts are what the majority believes to be true"? Bizarre.
There is an asymmetry for sure, but plenty of liberals also have incorrect beliefs -- liberal and left-wing NIMBYism comes to mind. It's really important to be evidence-driven and curious, and be willing to add complexity to your models as necessary.