A fairly obvious reason is that to generate a tulpa you need to screw up you mind in a sufficiently radical fashion. And once you do that, you may not be able to unfuck it back to normal.
This is a concern I share. However...
I vaguely recall (sorry, no link) reading a post by a psychiatrist who said that creating tulpas is basically self-induced schizophrenia. I don't think schizophrenia is fun.
This is the worst argument in the world.
This is the worst argument in the world.
I don't think so, it can be rephrased tabooing emotional words. I am not trying to attach some stigma of mental illness, I'm pointing out that tulpas are basically a self-inflicted case of what the medical profession calls dissociative identity disorder and that it has significant mental costs.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.