I mentioned this exact point in what I just posted..My opinion isn't worthless.. But it's WORTH-LESS then a 65 year old Italian guy that was in the enviornment from which these screenwriters create a "good" mob film.. I'm not gonna be so arrogant that I'm gonna pretend I know more than he does..
Thats what these hipster reviewers do...I also honestly think music is so nuanced that you can't just be a general music reviewer (pop, metal, country, hip hop) You have to have specific experitize in a certain genre and a resume on how that expertize was formed..
It reminds me of these AM sports talk show hosts are jack of all trades but masters of none.. How you gonna be an expert on football, basketball, hockey, nascar, boxing AND soccer? Fukk outta here 
Thats how I view these "general music reviewers"...If I want to know about boxing then I go to Max Kellerman, if I wanna know MMA, I'll check Joe Rogan, if its basketball I'll look for Chad Lowe, if its hockey then I'll search out Barry Melrose...
You just can't say "I know sports" or " I know music" because chances are you are just a casual observer and are only scratching the surface...