Yeah this is absolute bullshit.
Let's set aside, for a moment, that this dude took the shrooms something like 48 hours prior. 100% this guy was not under the influence of psilocybin while on that plane.
But all of that aside, this just isn't how shrooms work. I know it can affect people in different ways, but I've taken heroic shroom doses before. Never, at any point, are you unaware that you're tripping, or think you're "dreaming" like this guy claimed, unless you're literally experiencing ego death. In which case, you're not even making it off the floor of your living room, let alone onto an airplane (with the company you work for), and into a cockpit.
You're not going through security, getting on a flight, acting normal enough to get into the cockpit, and then being lucid enough to make a deliberate move like he did. You're not even going to be aware that you have a fucking body.
And if you're not tripping hard enough for that, then you're not tripping hard enough to earnestly believe you're dreaming. Because that's not how psychedelics work.