Definitely true a lot of the time. You have to find the root cause. And the job itself might be it.
However, you can make a bit of a fine distinction: is your job making you unhappy, or are you unhappy in your job?
If you're doing boring work with no appreciation and low pay, or if everyone else at work is unhappy too, then it's probably the job. At the other extreme, If the things you're unhappy about with your job are the same things you've been unhappy about with every other job you've ever had, then maybe you need to use the therapy to figure out why you are the common thread.
(Actually, those two aren't mutually exclusive. Maybe the job itself is bad for you, but you have a pattern of picking jobs that are bad for you.)
However, you can make a bit of a fine distinction: is your job making you unhappy, or are you unhappy in your job?
If you're doing boring work with no appreciation and low pay, or if everyone else at work is unhappy too, then it's probably the job. At the other extreme, If the things you're unhappy about with your job are the same things you've been unhappy about with every other job you've ever had, then maybe you need to use the therapy to figure out why you are the common thread.
(Actually, those two aren't mutually exclusive. Maybe the job itself is bad for you, but you have a pattern of picking jobs that are bad for you.)