I often used to describe LSD as being a tool for deconstructing what we learn about the nature of reality. It just strips bare the constructs that society, culture, politics etc uses to shape the consensus, and lays out an undeniable insight into the actual nature of being in astonishing way.
DMT just takes it even further. And interesting that DMT is released when we dream too.
I think it's misleading to even label these substances as drugs, as that conjures up images of escapism, recreational use/abuse, hippies and airy/fairy ideas. If society took these tools seriously (like shamanic cultures do) we would learn a lot about ourselves and our place in nature, without the bullshit ego first mantra that leads to the world based on personal gratification and endless consumption that we see.