It’s safe to assume without extraordinary evidence that anything posted on LinkedIn is at best glorified reality, but most likely complete fabrication. There’s zero incentive for anybody to be truthful.
We weren't discussing truth, but honesty. Someone deluded can still be honest given what they (falsely) believe.
Besides, I wrote about how there are multiple incentives to lie, and a platform were you're not having a financial interest in what you write, removes some big ones. Doesn't mean something like 4chan doesn't have others.
Still, I'd expect to find a homest to god personal confession in 4chan or Reddit way more than on LinkedIn.