Because I don't believe that there are fantastic scripts out there not getting made. The crap we see is the best there is, sadly. (I have several friends in the movie industry.)
At that level, I think it's possible that some fantastic scripts slip through the cracks.
There's the highly prestigious Nicholl Fellowship, run by the Academy of Motion Picture Arts and Sciences, that awards up to 10 fellows a year based on their sample scripts. Scripts judged to be outstanding by actual respected Academy members. Most of those won't sell either, although the writers will get jobs out of it.
The Black List has become more political in recent years, but it's a list of great scripts that don't get made.
The Coen Brothers and Woody Allen seem to be able to make whatever the hell they want, but other geniuses like Scorcese and even Spielberg have projects they've been trying to get off the ground for years, and haven't yet succeeded.
Based on all that, I'm inclined to believe there are plenty of great scripts that don't get produced.
Based on what I see on TV I have to believe that the Rolodex counts for far more than the writing skill because there's a ton of crap getting produced.
On the bright side, there's way more stuff than I can reasonably keep up with, so the relatively small amount of good stuff is maybe about enough.
To put it another way, what is a "good" script from the point of view of the movie industry, and how many people actually want to write one, and would be willing to put their real name on it?
If you look outside the blockbusters, and even at many blockbusters themselves, most scripts aren't that good. I know a few people who watch a lot of terrible movies who are kind of allergic to quality, or at least allergic to the aspiration to quality. They are tolerant of crap and want their movies to be tolerant, too. A friend of mine is a huge fan of horror and action movies, and the only movie he has ever walked out of was "The Thin Red Line." Why did that movie offend him, out of all the movies he's seen? It wasn't because it was bad. (He and I saw "Deuce Bigalo: European Gigolo" in the theater.) It offended him because it insulted his taste. It aspired to be better than the movies he liked. That's what I'm guessing, anyway.
So if you're in the movie industry and trying to get a non-A-list movie made, you have to think about who's going to go see it. Writing a "good" script by your own standards may be a mistake. Maybe writing a "good" script only proves you don't understand the business and won't be an asset to the people who can help you. Maybe showing some hustle, some talent at getting noticed, and some crass instincts is necessary, not to draw attention to your good writing -- nobody gives a shit about your writing -- but because hustle, self-promotion, and crassness is how you prove you can succeed in the industry and help them make money in the future.
Like, for example, "Reality Binge" or "Celebrity Drive-By"? Which happen to be the author's two shows (http://www.imdb.com/name/nm1941257/).
Based on the titles, though, I would hazard a guess that they would trigger my Crap-o-meter.
But as another poster pointed out, "crap" depends on your goals. If eyeballs and ad revenue are the metric, maybe these shows are models of quality.
Discussions on "How to be Successful in $INDUSTRY" really need to clarify the meaning of "successful."
For some, the prospect of selling scripts so long as they are in the realm of low double-digit-IQ appeal may not be considered a win, while others might see that as hitting pay dirt. Either way, you should know before following someone's career advice where it will lead.