I mean, yeah, the friend should probably sleep on it (if she hasn't already). But presumably part of why she's quitting is because she wants to build a life outside of ballet while she still has time. It's incredibly hard to build a career in ballet but also... it's hard to do a career change in your 30s or 40s (& realistically, you're probably not doing ballet on the back end of your 40s, right? So if you're not getting lead roles and getting paid when you're young, you're kind of screwed).