not true at all, there's a huge amount of just work that goes into it and alcohol/drugs makes that harder and is why lots of bands failed after they got big
that's moral philosophy not modern psychology, there is branches of psychology that try to focus on that like positive psychology but I don't care for them.
youtu.be/Af5RSk6Bx-Y
this is a lecture I really like that goes into that
Modern psychology was formed basically so academia can do research and pharmaceutical companies can make drugs. In order to do that you need metrics to establish aberrant psychology, and groups for how people respond to different treatments.
All having "depression" means you get X measurements and the psychologist thinks your negative symptoms will be reduced by treatments designed for people in that group.
ALL modern psychology is concerned with is coming up with groups that respond to treatments in a similar way (diagnosis) and then finding treatments that reduce their symptoms. It's very useful if that's how you view it but it doesn't do anything past that.
It basically depends on the psychologist for the most part it's just not having the negative things they identify, being integrated/mature that sort of thing. depth psychology like jung has that more.
I haven't gone into existential psychology yet but I think they also have sort of a more positive attitude, but as soon as you get into that stuff like I said you're better off just reading philosophy rather than getting it second hand through a psychologist.
for an actual answer just read nicomachean ethics