Welshgit - great to read about your daughter. Don't let her give up. My daughter suddenly dropped everything she was doing. Acting, singing, piano & guitar. Appeared on tv, loads of local productions etc. Difficult to know when a parent should interfere or not interfere. No win situation. I didn't interfere ( not too much anyway ) but should have! She regrets it.
My lad didn't give up his sport. Finally didn't make it as a pro, but coaches junior football teams most nights of the week, and recently approached by Barnsley FC to coach their academy keepers. Earns a packet whilst still a student, and more importantly, loves it.
Far be it from me to advise you, no way, but if I may say, take heed, if she does show signs of giving up (young kids and all that), maybe do interfere!!!