What planet are you living on? Maybe try opening up a news website and read about the American job landscape for a dose of much needed reality.
Once again, that's why you join a union. That's why you spend time in school, building qualifications so that you don't have to take any job available.
No, you can't just "waltz into" a big job. But we're talking about working in Los Angeles. Put the time in, go to school, get some experience, and then companies will see some value in what you do. If they don't, maybe this isn't the job for you.