Some people seem to get addicted to therapy.

The term addiction implies that what you are addicted to is not good for you. I couldn't go more than a minute or so without breathing, or a few hours without water, but I wouldn't call that an addiction. Same kind of thing goes for music.

Of course you can have too much of a good thing. Hyperventilation, even water intoxication. But that's a different thing from addiction.

"A little of what you fancy does you good". Even anger.