Im fairly certain that what I'm about to say will be disliked by ketamine users and abstainers.
Ketamine is garbage at everything besides temporarily lobotomizing people. It works for it's many uses because it makes the user stupid. It's often given to suicidal people, not because it's a miracle drug, but because it incapacitates them in a safe manner.
That said, it's great at making people too stupid to be able to hurt themselves, most of the time. It's great at numbing psychological pain because the user will be too stupid to conceptualize their own thoughts or realize where they are physically.
It's also hard on the urinary system and has a fleeting high.
If you like ketamine then by all means, you do you. If you may be interested in trying ketamine, become a zombie safely, just don't expect it to cure your depression, woes, or any of your other problems.