Any perception is real. It was really perceived. Maybe the perception didn't correlate closely to "objective reality", but it happened, and so is real. That much is not really arguable. Whether it's "bollocks" or not is a different matter.
Usually, when I've been tripping, I've just had a really good time. That fits in with intentions, as I've most often taken psychedelics because I enjoy what they do to my mind. I like the fractal, three-dimensional animations, enhanced imagination (with acid, making my own music in my head that sounds like I've got it on CD) and heightened emotions (on LSD, again, euphoria/excitement that MDMA has never even approached). So on that level it's definitely not bollocks.
That's not what you're talking about though; you're on about whether or not psychedelics can give us some sort of insight into reality that we wouldn't otherwise get. From my own experience, they can certainly change what we focus on, or perhaps bring subconscious thoughts into the conscious mind. On an aMT trip I saw the cycle of life, generation giving way to generation, visually before me. It made me think about my own mortality, and it made me consider my priorities. I realised, consciously, that I had a responsibility to look after my parents in their old age. It occurred to me that part of the reason people have children is to buy themselves security for their old age. I hadn't really thought about this before, and I haven't fully come to terms with it, as I think it's pretty fucking selfish, and as I don't yet have children, I feel a bit worried about my own situation. Who'll look after me? I don't know. The point is, it's a fairly serious subject which I hadn't considered until aMT brought it into my mind, visually. It felt a bit like I was being forced to grow up.