A couple of comments...

First of all, when you talk about the effects of a substance such as dmt, I recommend you dont say "dmt shows you (whatever)". Rather say "dmt shows me whatever".  I for example dont agree with you, so I dont feel its right that anybody speaks for others what their psychedelic experiences are like.  I know you didnt mean to impose your vision but this is a suggestion to be as aware as possible of how you use language and words to communicate your ideas . 

Now as for the specific thing you said, one thing that psychedelic substances showed me is that not every insight is true, that we can be fooled or mistaken with our subjective perceptions. So you had a trip that showed you will live after death in the 10th heaven together with the angels (I know thats not what you said, just for the sake of argument here), does that mean its true? So does it mean its true for people that trip that aliens are invading their body with aluminium-copper instruments, even if it seems very very real to them?  etc..

In any case I do know what you mean about the perception that is common, that life is just a part of the process, that one way or another it all continues, but in the end who's to say whats after death?  I'd rather take the "I have no idea and it doesnt matter in the very least because I still have to try and go about my day the best way possible" position, but each one to their own