I don't support delusional thoughts - delusional being defined as thoughts that are the result of a neurological disease...that's the only definition I know for 'delusional'. The word is commonly used today as an insult or an expression of disagreement, but it actually is a medical term.
I think I'm kind of saying the same as you, but using different words. Maybe not - here goes - tell me what you think - I don't believe that we entirely 'create our own reality', we do tend to create a set of beliefs, that's for darn sure, but that set of beliefs is often (if not usually) very, very much non factual, and what the culture believes as true, is very often, directly disproved very easily, the point of 'culture' being, that the undeniable proof is in fact, denied - ignored, denied, prosecuted, or screamed at or all of the above.
I guess for me, 'creating our own reality' suggests we can change physical real things by thinking - reality being physical objects, laws of nature - we can't. All we can do is pretend we can, LOL.
There are facts that exist that cannot be brushed away or denied...but they routinely are. And the more angrily and absolutely they are denied, the more they are likely to be a set of beliefs, rather than facts.
Or as a book I read yesterday called it, 'The ingenius product of strenuous intellectual effort', LOL.