The problem is, that ketamine is used a lot as an Escape drug.
It serves its purpose very very well too. Even when your not in a hole and do lower doses, it makes the world a friendlier place and you generally dont care as much.
Thats why a lot of people binge on it i think too. Its kind of what alcoholics do isnt it, they just have a life that is most of the time, Intoxicated by alcohol so they dont have to experience too much of the real world.
If peoples lives are normal, and they are happy enough. Then yes it can be used that way, i did for a while.
Granted i dont plough through grams of it, but i do use it more often than id like to be, but when the shit hits the fan i just use it to escape. That sinking horrible depressive feeling is awful, and i cant make it go away any other way. It seems to come in waves too, been like that for years (long before any drug use)