It is pathological in it's own right to paint the world with such broad and biased brushstrokes.
Plumbing is about making a lot of money, they benefit from you pipes leaking again.
We just have to hope that human beings actually care about their work.
I think this is a two part problem. If you talk to a particular therapist/counselor it would be very rare to find one that doesn't want to see you get better. In general the people at this level are empathetic and do care.
But above that there is a 'rehab system'. You start moving away from the people that want to see other people get better towards that people that want to see the system make as much as much money as possible no matter the cost.
We talk about systems like this all the time here on HN with the term 'Molochs'. Systems where the individual optimum would be X, where X is things people actually like and think are good. Instead the system optimizes towards Y, where Y is far worse outcome for individuals, and individuals are seemingly powerless to stop the system from optimizing on Y.
https://slatestarcodex.com/2014/07/30/meditations-on-moloch/
Rehab is about making a lot of money, not healing people, they benefit from relapsing, they have zero incentive to help people.