Writers would submit scripts to me, and if I liked one well enough to submit to magazine editors, I had the know-how whether the story was good or bad.
Don't let anyone discourage you from writing. If you become a professional writer, there are plenty of editors, reviewers, critics, and book buyers to do that.
None of the editors I've worked with have ever asked me to pull my punches. They've never asked me to give them anything other than my own interpretation of events.
I dreamt of being a writer once I started to read. I started to write 'Bonjour Tristesse' in bistros around the Sorbonne. I finished it, I sent it to editors. It was accepted.
Amazon is such a big player in publishing, but a lot of authors feel this connection to their publishing house and their editors who helped them get their books out there, so their loyalties tend to go that way.