I’m also an actress who has been a producer and a writer who has been an editor. What you say is true but I would add a couple of things.
When you audition for a part or when someone reads your headline, both the casting director and the editor (or reader) are rooting for you. They hope what you’re going to show them is wonderful and they’re disappointed when it’s not. They’re especially disappointed when it’s wonderful but it’s not what they’re looking for.
There’s a story about how Bette Midler was up for the role of Mary Magdalene in Jesus Christ Superstar on Broadway. Her audition was spectacular but, reluctantly, the team decided not to cast her. Why? She was too good. The character of Mary is secondary. With Bette on stage, nobody would be looking at Jesus. If the name of the show was Mary Magdalene Superstar, she would have gotten the part.
Some years ago, I wrote a spec script for the television show, “Cheers.” The producer wrote back to say how good he thought it was but he couldn’t use it. This was because one of the characters important to my story wasn’t returning the next season and they already had scriptwriters assigned for all the shows in the current season. Nobody’s fault. It’s just how it was.
My point is, that you can do your best, they can love what you do, but if it doesn’t meet their current needs, that door is closed. Just keep doing your best, keep knocking on doors and sooner or later someone will buy what your selling and consider themselves lucky to get it.