Writing is a communication.
Ninety percent of everything is crap.
You must write to the people's expertise.
Science fiction, outside of poetry, is the only literary field which has no limits, no parameters whatsoever.
Ask the next question.
You don't sit up in a cave and write the Great American Novel and know it is utterly superb, and then throw it page by page into the fire. You just don't do that. You send it out. You have to send it out.