I've observed that this exists in all domains. Unsubstantial critique is cheap and at everyone's disposal. Generously, I think it can be interpreted as an appeal to common sense due to ignorance / lack of specialization. There's probably some heuristic like, "the more specialization required to understand information, the easier it is to invite empty critique."

I'm not very generous though. I personally think the majority of people are more interested in being right or sounding clever than arriving at truth or understanding.