Mark, I don't particularly care what you write. More power to you. I don't like the parody of fantasy others call grimdark or blood-porn, but I know my distaste for it doesn't make it bad, just as your enjoyment of it doesn't make it good.
What bothers me is that there's an audience for this stuff. It skeeves me out that there are thousands or tens of thousands of people out there who wait on line for the next installment from what is, basically, a group of writers racing each other to get the most blood per page, the most hardcore anti-heroes they possibly can, using villains for protagonists and therefore the antagonists have to be even worse by comparison, murdering off all the likeable characters and raping or torturing everyone else. It's somehow loved for reversing every trope and archetype that's existed in fantasy, soaking it in blood, and jamming in our faces that life is terrible, brutish, short, unfair, and no one cares.
Gee, thanks. Now 'shut up and take my money'? Not so much.
I think theres a fair bit of hyperbole in that post. It reads like you feel the incursion of "gritty" fantasy is in some way demeaning your love of classical fantasy. It doesn't in the slightest and isn't purposefully written because someone has though "you know what? Aragorn is a right jessie, I'm gonna a write a book that shows my disdain for the genre and its fans..." Noone writes a book for that reason, or if it was their motivation it would be garbage and never get published. People write what they want to write because they enjoy it and feel others might too. And they're aren't mutually exclusive, I love both sub genres - gritty and shiny, provided they are written well.
I think they co-exist quite peacefully, and you can't be upset at the fact that a gritty fantasy might take the place of something else on a publisher's books because plenty of people love it, what makes your desire to see more heroic fantasy any more worthy than others?