You're welcome

"is the notion that if you train to practice then you need to undergo a course yourself... and hence... clients who try and understand it are appreciated."

And here in the USA it is not an optional idea but is a manditory part of the training for a person wanting to recieve their certification and or license to pratice in the therapy profession to enter and have a therapist during their studys, internship and during their 2 years of supervision.

Not only is it for the experience of being a client but is also there to help prevent the therapist from burning out on their clients problems, their therapist also helps them to learn how to manage their own time for their own problems and in some cases helps with teaching hands on approaches that they don't always get to practice in the classroom like role playing and other therapeutic approaches that they may use in practicing in the field.

Basically a therapist having a theraist is as much for teaching and learning purposes as it is for the experience of being a client.