https://www.amazon.com/Hallucinations-Oliver-Sacks/dp/030794...
where the author postulates that a decent portion of society experiences hallucinations at least once in their lifetime without any "helpers" like drugs or sleep deprivation. (I don't remember the exact percentage, read that thing ages ago).
I think this is how religions get started.
What on earth are you reading to get this? The parent is a concise statement of fact:
You don't have to be drunk or high to have hallucinations.
How is that anything like you describe? How is it "tactless" and "disrespectful"? How does it assume anything? Try applying the most charitable view to the comments.
Not all hallucinations are religious.
And not all religious experiences are hallucinations.
In fact, when we talking about a specific kind of experience, the term hallucination has no meaning.
You're not "seeing things", you're feeling and thinking things. So there's no relevance at all to whether they're "really there".
You could have a religious experience by runinating on something that's actually, 100% there (e.g. an experience with near death from a car accident that makes you appreciate life in a religious way, or even a nice sunset).