Yes I don't mean to be taking the position that I am a "believer" in ESP. My dividing line is in my view strictly pragmatic - I am not sure exactly how I would define that, but my attitude is something like "if it can be shown to be a repeatable phenomena that can be observed by more than one observer over time and under conditions that eliminate subterfuge, then I don't care how many "scientists" have previously said it "can't happen." The "proof is in the pudding" and all sorts of other cliches that focus on the actual results rather than on prior predictions of what is possible.
On the other hand, the question is "Do we have to suspend judgment and accept any alleged theory where someone says 'it hasn't been proved yet, but it will be?" My answer would be "no" to that too.