<human>: Can you summarize the given text in a few sentences?

My mother has recently expressed a desire to go back to graduate school to train as a therapist with a concentration in treating drug and alcohol addiction.  She currently has a job that she doesn't find fulfilling.  My mom is very intelligent and I don't doubt she'll be a straight A student, but I think she'll hate practicing therapy.  My mom takes everything very personally (when a plumber misinstalled a water filter she thought it was a  "defiance" of her wishes instead of a simple mistake).  If anyone in her life (not only me) says one thing but does another she takes it as a deliberate deceit regardless of circumstances.  Sometimes she gets angry, sometimes she feels betrayed and cries, but she is not one to keep her emotions to herself.

My concern is that a lot of her clients will go through relapses, or not keep up with their therapy, and she will be really hurt and an ineffective  therapist.  As a result, I'm worried she might burn out, and be left feeling like she wasted her time and money on grad school.  Basically, is there any way I bring these things up to her in a non-judgmental way or should I just keep my mouth shut?  If anyone has inside knowledge, will part of her education be how to handle clients who "lie"? (By my mom's strict definitions or anyone's.)
<bot>: My mother is planning a career change that I have good reasons to think will go badly.  Should I say anything?  If I should, how can I be kind and tactful?