I consider myself a skeptical person, and I agree that it can be healthy. (I'm INTP, myself). I think it's perfectly reasonable to expect a therapist to back up what they say, to give reasons how what they do works and what reason they have to think so. If they can't or won't do this, if they give me some, 'I'm the expert and this is how it's done so you should just do what I say' attitude, then I figure they're talking out of their *** and/or don't respect me enough to let me make my own informed decisions. Both of these are deal breakers for me, and should be.

I do think there's a place for trying things out if you're not sure of them, simply because it's a soft science and while reason and evidence are still important in deciding what's reasonable to try, you often can't make an airtight case the way you might in the harder sciences. I think of it as something you can't really have solid certainty about. But you can still decide whether it looks reasonably promising, enough to give it a try. I've decided for the time being to keep my skepticism and doubts with me while still trying things out. There's no proof either way, so I might as well do something different.