She also wants to help animals. One of the reasons she chose this field was because she wanted to work in animal rehabilitation. There isn't a plethora of opportunities in the animal rehab field that offer good income, but she can apply what she knows about humans to helping animals in her free time.
A practical aspect of this profession is that it's not one easily replaced by AI. Occupational therapists offer empathy and emotional support. It will be many years before an AI bot will be able to credibly offer these services to patients.

Dear @agmoore !
I assumed you wanted to cover the cost of your granddaughter's vocational training!