I hear what you're saying and I don't doubt its truth. I think I'm in the minority but for me, so far, I haven't found the "more serious" psychedelics to be more opening, or insight inducing. In fact I've found almost the opposite of what others have said. Chemicals that some people call "light and recreational" are what have given me my most meaningful trips. Why? Maybe it's because my psychology has put up such a barrier that I need a kinder gentler touch: When everything seems easy, beautiful, full of love, my guard is let down and I get a brief peek at the universe for what it is. I see something that, otherwise, I would have been too constricted to perceive. My mind is blown.
Maybe one day that will change for me. Last time I tried 2c-e was about 10 years ago and I was someone else back then. I think I'll wait another 10 years or so before trying 2c-e again: I'll surely be yet another someone else by then and, perhaps, ready to receive what it has to give.