Can you see how some people might take that statement as judgmental? It implies that people who have been in therapy for years and have worked very hard and have tried everything they can think of, yet still suffer from depression have not been doing it right or have just not tried hard enough.

If we agree the causes are very complex and varied then the outcomes will be just as complex and varied. There are many reasons people overcome and many reasons why people do not overcome. Some people take one anti depressant and it works for years with no therapy. Others overcome situational issues in life through therapy and get relief. Others in spite of all their efforts continue to have to live with it and manage it as best they can. It isn't that they are doing something wrong or do not have right thinking.