Also, the Buddhist lineage it sounds like you are referring to is one of many. Because you mention vipassana, I'm guessing Theravada / Hinayana. There are other vehicles that have different precepts & ontologies, e.g. Mahayana and Vajrayana.
That being said, I do firmly believe that having a solid foundation will benefit any experience in expanded states of consciousness induced by psychedelic medicines. This foundation can be nurtured and supported through myriad means such as meditation, therapy, and other forms of mindfulness-based, somatically-oriented practices.
With this foundation in place, it is not uncommon for people to reach much deeper states of meditative capacity and awareness through the careful use of these substances. This is why, within the guide communities, it's often said that a single daylong guided experience can be equivalent to attending a 1-month silent meditation retreat, or 5 to 10 years of psychotherapy.
From my personal view, there is no comparison to 'that' and getting my every day perspective closer to it. I think psychedelics can be interesting to see that change is possible, that things are not set in stone, least of all your mind, but it's ultimately proven to be no real solution (for me :) )
I think the primary common interest is the meditation aspect due to the similarities in effects, but then out of that often comes similar viewpoints on life.
> At least from a vipassana perspective, anything like psychedelics will just get in the way.
No doubt they have an effect, but in what way do you think they "get in the way"?
That being said, I like the idea of using these kind of tools in a controlled setting for treating certain psychological issues. I hope they're careful in not getting too many people zonked out on newly created mental constructions. Though I suppose its better to be happy than depressed, regardless of the conditions surrounding it.