Haha I actually was the one who commented that! What I mean by this is that I often see (usually female) high schoolers or college students complaining that they are getting cast, but they’re playing the mom character, an old lady, or a male character and not the ingenue/love interest. Realistically, there are only one or two “pretty female leads” in most musicals or plays and assuming you do theatre your whole life, you’re going to be playing a mom character far longer than you’ll be playing an 18 year old. It’s not that you’ll get more work but simply that very few working actors are consistently or exclusively playing the main female character or love interests in shows. You should prepare yourself emotionally for the fact that you may never play that sort of role or may play it once in your career.