Maybe because psychedelics don't teach you any new "objective" information but rather a completely different (and convincing) way to interpret the information you already had.
"Our perception of time flow is just an illusion". Any smart person understands what that sentence means, but the default state of your brain is believing the illusion, so you don't really feel it, you only understand the concept.
When I was on LSD, time flow being an illusion was the default state of my brain. No need to make a mental effort to understand anything. It felt as natural as breathing.
But it's hard to explain these natural things without sounding line a crazy person.
I am not the parent, so I cannot comment on this specific realization.
But if I may, I want to give a point of data of one effect in the actual world beyond the illusion of the drug, which I believe is what you asked:
During an LSD trip one day, I could easily imagine the vision of a third party watching us, the human race, as one would observe ants going on with their lives. This observation would span across all the civilizations though time on earth, like an epic movie/dream if you will.
In this imaginative "history of the human race" playing before me, I could see myself as I was, that is only a faint bleep, that one day was born, and the day after would die.
This made me feel how insignificant we are, and how futile our day-to-day vexations can be.
This is not a new idea, I was aware before the trip that we are not a lot in the grand scheme of things. But feeling it is another thing.
Having at this very moment as little emotional attachment to my own life as anyone would have to Mr Random Smith born in 1865, made me _feel_ how little we all are, and how almost everyone really live in the illusion that their life, their values, is somehow so important and timeless, whereas in reality, it is probably just a result of being born at a time and a place. In short: life is short, and values are very relative.
So I came back from this trip having understood more of the world. Not as if I magically understood the very fabric of reality. Not as if I became a saint, as if every issue in the world has been revealed to me as self-evident. But as if I became a little wiser, by the simple virtue of taking off my ego for a few hours (if not for real, at least in feeling).
This realization, this feeling, I came back with it. I keep it constantly with me, still to this day. It helped me grow as a person.
And it really helps me to put my daily vexations into perspective. I am more serene because of that. This, to me, is not an illusion, but an actual helpful epiphany I had.
"Our perception of time flow is just an illusion". Any smart person understands what that sentence means, but the default state of your brain is believing the illusion, so you don't really feel it, you only understand the concept.
When I was on LSD, time flow being an illusion was the default state of my brain. No need to make a mental effort to understand anything. It felt as natural as breathing.
But it's hard to explain these natural things without sounding line a crazy person.