Somehow, it’s easy to not realize, no one deserves “a show”.
If there’s a story you want to tell, using other means, writing, comics, animatics, etc. is totally fine and doesn’t make your ideas or dreams any less real.

Don’t hold out or delay on the story you want to tell because of a one in a million chance of making it thru a studio system with timing and luck.
There’s nothing wrong with trying, just don’t hold yourself back because you only see one path.

And to add cause I had coffee, I got two pilots based off the work I mostly did outside of a studio. I made a really crappy short- that got me a board job, and I lucked into getting a short based on my webcomic after updating that for three years.

Getting that far was luck, but those opportunities wouldn’t have happened if I’d only been pitching to studios.
And if you want to be a great showrunner, the best I’ve worked with have worked in multiple positions before they moved up.

It’s a relief when your showrunner understands deadlines, how to give notes, and how to delegate and not burn out their team. It’s honestly better for you to start in an artist/production position and learn what you can there. If that big showrunning job happens, you’ll be ready.