It may have been "crude" but it was clean and actually worked. And most of the ship was bright and clean. Gritty isn't just about the level of grim on a machine or the tech, but a general attitude of the story and characters.Gritty? Downbeat? Did we watch the same movies?Given that Harlan's original version of "City on the Edge of Forever" featured drug dealers among the Enterprise crew, it would come as no surprise to me that JJ's more relatively gritty and downbeat portrayal of Star Trek's future would appeal more to him.
Gritty? umm, lessee ... engineering being mostly crude 20th century leftovers, throwing away exotic assembled in orbit approaches in favor of hammering ship together on the ground, articulating phasers that look like water hose sprayers they are so 'advanced' in appearance ...
Downbeat? Vulcan turning into a GHOSTBUSTERS logo, casual eradication of entire pre-Abrams Trek reality (something I guess Abrams wanted to do with the merchandising as well)
If death and destruction had never been part of Trek prior to Abrams, you might have a point. The "pre-Abrams Trek reality" hasn't bee eradicated, casually or otherwise and anything that "existed" prior to 2233 is part of both timelines.