yes Nichi, and that is a central point. in my experience, even back then, the difference is not the effect, but the intent and spirit of the person taking the substance, whatever it may be.
i used to think back then that if i could just get people stoned and then present something of power, they would see and understand. it very rarely happened.
there is inside some people a genuine fire of quest, in essence a wanting to return to the source of our being, which may be covered by all kinds of rubbish, but although one could argue that this exists in everyone, it is obvious to me that some have this active, and it is that that becomes 'excited' under the influence of AP shifting forces. But for the others, it can't seem to light up no matter what the situation.
So this active spirit in a person is the real issue, not the use of power plants. And for many, power plants are definitely not recommended - it is not required for all aspirants, in fact best avoided for some. For the others, there is no doubt power plants have a transformational effect on their lives, but always it should never become an indulgence and over-used.