I hate the “You’ll never make it big” argument as a deterrent for aspiring writers. Look, I’ve done my research, I know how tiny, tiny, tiny of a chance that I or anyone else will “make it big” is. But listen, my guys, that chance isn’t zero. Every famous author started out with the exact same odds, remember that, don’t let people who shove “you can’t make it big” down your throat deter you.
And if you DO fall into the vast majority and your story doesn’t get that movie you dream of, and it doesn’t sell a million copies, is that really so bad? No matter the scale your book is read on, big or small, someone out there will read it, and someone out there will love it just as much as you do. So write, guys, write.
The world will never run out of a need for stories, it needs you.