I went to a school with a big time theater arts program. It won all sort of awards and all that. Highly rated. Of all the tech people I worked with, ALL of them went out in the world and got jobs doing something vaguely techie and sort of involving theater in some way. One even ended up being the sound producer for NPR. A few went to movies and TV, me, I went into rock shows. Most of us went into the union at some point, as that was stressed and our tech teacher made sure we got jobs in college doing union work to get us on our way. BUT, of all the people who studied acting, not a one of them made a living at it.
Think of a major series like Law and Order or Sex in the City. There are (were) like maybe 7 people on that show who make a living, albeit a good one, doing that show as actors. There are probably 40-50 who have steady work on the tech/set/production crews. Figure the odds for yourself.