It works.
Not at 10 pages. I usually do 30-80, but the concept is the same. There is a reason and perhaps nothing else I say will be as important as this:
Every year I read multiple scripts that are great from page one.
Multiple scripts. From. Page. One.
Pretending a script that only develops after it's burned through 20 pages is as well-written as scripts that are gold from go is an insult to the writer you will become. Because you will write a gold from go script. With hard work and research you can get there.
As a low-level reader, I'm as low on the totem pole as you can get without having to walk someone's dog (which I know because I've also been the dog-walker). I'm like the guy you sing for in the Idol audition who clears you for the next level or not.
He doesn't need to hear the whole song.
People hate this because a script is both execution & idea, and without the whole script how can I judge the idea? For starters, I read the start, middle, and end until I have the idea. I like ideas.
But a great script is excellent idea plus excellent execution. Not either or. BOTH. Many scripts have this. Those get my recommendation.
You will write one of those scripts. The fact you read an obscure blog that doesn't even allow
Until then the worst thing that can happen is a mediocre script gets splashed around town with your name on it. That's the nightmare scenario. You want to be an unknown writer while you develop. It's protection.
It beats the Hell out of being the writer known for his sh*tty first 10 pages.