Divorce rate is very high in the western world so we can’t assume half of the population are all unstable. Being divorced or remarried or single or cohabitating it’s often just how life played out or a life style and not a sign of stability or instability. In addition therapists are people like all of us.

People living alone aren’t necessarily lacking intimacy or closeness. A friend of mine had been living alone for many years. She and her boyfriend prefer to maintain separate residences. It’s not an uncommon choice in older age. They enjoy time together and then going to their own homes.

People could also enjoy closeness and hugs and not be in a relationship. Two of my best girlfriends are single women living alone. They enjoy friendships and relationship with family members, their careers and hobbies and one is also a big dog person. They are out and about. There is more to life than having a partner.

I am 55 and I think I am reasonably stable. I have a stable career and rather conventional life style. I got married second time at 50. Between my marriages I was mostly single or dated and I cohabitated once. When I lived alone I wasn’t lacking anything. I like to have my own space. Living alone isn’t necessarily a lonely existence. I personally was too busy to be lonely. Sometimes being in a wrong relationship could be lonely

I’d really not worry about how therapists live their lives because we can’t really know all ins and outs of other people’s lives