Is it that frankly most of the fan ideas for Star Trek are not only fanwanky crap, but sometimes dull fanwanky crap
Exactly! They're usually filled with plot points that don't make sense, some of the crew acting out of character, there's almost always some object or character from previous Trek that they just can't help bringing back, often they have some hokey new technology...
Just like the last movie, you might say.
Nah, if the last movie was like any of the crap fan ideas they never would have left the academy, or it would have been about the Klingons in Klingon with subtitles, or it would have been a Nemesis sequel that would have crammed every Trek character ever into it, or it would have been some uber Enterprise with fanwanky tech in another galaxy captained by either Picard's nephew's cousin's grandson's tribble's college roommate's son or just some random alien character, or just some random guy who's crew is basically a checklist of ethnic groups and alien races.
Plus unlike most fan ideas Orci and Abrams have an actual plot in their stuff and actually know what freaking stories they want to tell.
Most fan idea's for stuff usually is a bunch of Trek sounding talking points rather than an actually plot or really any info on the stories they want to tell