And look, I love Harry Potter's Neville Longbottom, but the whole point of him is that he's a clumsy, nerdy boob. He continues to be that for the first seven and a half movies, until his arc completes with him ... cutting a giant snake's head off in slow motion with a sword? Why? At no point in the series are we clamoring for Neville to be the guy who decapitates magic serpents. He's shown as having talents -- specifically, using magical plants -- but all of that goes out the window because in the end, being a hero only means being great with traditional fighting techniques.
I'm not saying that Neville should've been watering the shrubs while Voldemort was attacking, but maybe give us something more in line with his character. He can be cool without being Conan. Hell, Breaking Bad spent its whole run inventing ways for a sickly chemistry teacher to defeat drug lords who are stronger and more well-armed than he is. They didn't simply make him suddenly good at ninjutsu.
Gritty "Realism" Is Conveyed Through Ceaseless Cursing
People curse in real life. They do it in the car, they do it in the bedroom, they do it when they're in line at Gamestop and GODDAMN, RICHARD, THE TRADE-IN VALUES ARE NOT GONNA BE THAT GOOD NO MATTER HOW MANY "PRO" POINTS YOU HAVE, SO GET THE FUCK ON WITH IT, SHITLIZARD. But since lots of movies are shooting for PG-13 and network TV shows usually try to be family friendly, they have to keep it clean. When creators find themselves without those restrictions, they tend to go hog-wild.
So I get it, prestige TV dramas. You get to put on your HBO/Showtime Big Boy Pants, and you naturally want to curse a lot because Mom and Dad aren't around to tell you no. But do so many characters absolutely need to do it like they're auditioning for a Rob Zombie film? For example, the sister character Debra is the heart and soul of Dexter, considering the show reminds you at all times that the titular character lacks a heart and soul. But there are ways to illustrate that she's deep and troubled other than peppering all of her dialogue with curses that make her sound as if she's just discovered Urban Dictionary. You know, like actually giving her an important role on the show? That's just my two cents.
It comes up in Game Of Thrones, which desperately wants to be Definitely Not Lord Of The Rings, and Boardwalk Empire, which desperately wanted to be Definitely Not The Godfather, or Deadwood, which desperately wanted to be Definitely Not Renewed For A Fourth Season. I love you, Deadwood. I live and breathe you, Deadwood. But holy shit, it's hard to market a cowboy show, much less a cowboy show that constantly plays like a Greek tragedy and includes an errant dropping of "fuck" every six seconds.
Compare that (again) to a show like Breaking Bad, which was only allowed one or two F-words per season. When they come, they actually have impact. When Skyler reveals to Walter that she's sleeping with her boss, it's "I fucked Ted." Not "I've been messing around with Ted," or "I let Ted play on my slippery dulcimer, if ya' know what I mean." It's a gut punch. The fact that, realistically, she'd probably say it that way is just icing on the cake.