This is a lot stronger and better of an argument than trying to argue from DSM definitions. Be cautious about imposing mental states that can affect your decision-making is a good general rule, and yet tons of people happily drink, take drugs, and meditate. You can say each and all of these things have risks but people don't normally say you shouldn't drink because it makes you act like you have lower IQ or someone who's got a motor control problem in their brain.
people don't normally say you shouldn't drink because it makes you act like you have lower IQ or someone who's got a motor control problem in their brain
Well, that's why I don't take alcohol. (But agreed, people don't normally say that. And I also agree that Kawoomba seems to be overstating the danger of tulpas.)
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.