I don’t think this is an equal comparison to a guitarist critiquing another guitarist. Those guys aren’t filmmakers and while I’ve never watched a single critique of theirs, I’d imagine the dialogue/plot/acting took far more critique than things like cinematography, lighting or anything involving the technical side of movie making.
They’re no different than music critics from Rolling Stone or whatever publication, IMO.
And I’ve worked in restaurants far too long and dealt with guests critiquing food when they have the palate of a 3-year old to give any credence to that analogy. “A good steak isn’t supposed to be fatty, this is terrible” and they ordered a ribeye, bitching about prime ribs and filets after requesting they’re cooked well done, crying about the bourbon marinade “tasting like alcohol”, or people melting down over finding a vein in their chicken breast as if it wasn’t a living animal at one point.
They can certainly verbally voice their opinion, but there’s definitely a line where that opinion carries zero weight and is without merit.