This is good stuff and I feel the same way.
Merging the two worlds:
My way of coping is to think of ways to integrate my experiences with my work. This usually doesn't pass the thinking stage, but it gets me by. I think that we, as people who have seen the other side, should try to bring something back. I know you say it is impossible, but my view has always been that psychedelics give us the ability to access levels of abstraction and imagination that normal minds cannot comprehend. As TM said, we have the ability to create next-generation art, and we can use this ability to learn, communicate, and manipulate on levels that are inconceivable to minds that are confined to standardized ways of thinking. To me this equates to letting psychedelic concepts and modes of thought flow through us in our respective arts. Your art is just whatever you do from 9 to 5, be it fast food, science, corporate work, or whatever. The less your art resembles traditional "art", the better, because aspects of life farthest from what is considered art are the most worthy for our attempts at artification and because they will be looking in the traditional places. If we can turn everything into art - into a creative expression - then we will have broken down the machine and introduced one of the main aspects of hyperspace (unpredictability) into this world. I think that this is the direction that society progresses naturally. Where our creativity is most useful is in speeding up this progression. If we can foresee the distant future of humanity before anyone else, then we can push to manifest that future ahead of its time.
Leading a decent life:
Every once in a while, some respected CEO comes out as a past user of psychedelics. Sometimes I think the best we can do is to simply live a decent life, gain at least moderate success and the respect of others. Then, when society acknowledges us as model humans, we can come out of the psychedelic closet and say that all of our success, ingenuity, and love was made possible by psychedelic experiences that we had back in our golden years. I consider myself to have been virtually unconscious before LSD turned my life around, so the least I can do is give credit where it is due. I do write letters to my senators about the benefits of psychedelics when I'm up to it and do put up fliers advocating psychedelic drug use from time to time. The point is that if you're going to maintain this physical life, then you might as well fight for your "spiritual" values. And it is a never-ending fight. If you can make every thought and every action a small, subtle tribute to psychedelics, then your days will seem slightly less bleek. That's my belief, at least.
Anyways, sorry about the crazy ramblings. I just really identify with your situation and I think about our predicament a lot.