People mistakenly think acting is pretending or lying, it’s not. Acting is storytelling and it’s hard to be a good story-teller. It’s a craft that involves being able to: audition, analyze a script, build a character, memorize lines and blocking, work with a cast and crew, take direction as well as perform in a variety of mediums (stage, screen, web productions, voice over, etc). “Acting” is not just one thing - it’s many things combined. Some people are good at some parts and not good at others.
Professional acting is even harder! It’s show BUSINESS, not a lottery. There aren’t a bunch of open auditions anyone can go to. Actors have to be invited to professional auditions, usually through an agent. But an agent doesn’t run an actor’s career-the actor does. Professional actors need to understand contracts, unions, taxes, marketing, networking and the like. They’re basically starting and running a business where they’re the product being marketed and sold.