As someone, who never finished university, I can tell you that a degree is never a must. It does help, rather than hinder, but it's never mandatory (unless you want to be a doctor, lawyer, etc.).
I graduated high school less than 5 years ago and I am currently a team manager at a serious IT company, dealing with online advertisement. I am soon moving to a position in one of the top mobile tech sites as a journalist. And all this is done with just a high school degree and a lot of determination.
The best course of action here (in my opinion) is to just let your daughter decide what to do and support her the best you can.
Then again, I am not a parent, nor have I made any achievements in the gaming industry, so I could very well be wrong.