To be fair, these realizations are a commonly reported effect of psychoactive drugs. They are common, and the realizations are strong enough that the participants occasionally internalize those ideas.

Whether or not they're true objectively doesn't really matter if the participants believe them to be true.

If they believe those ideas to be true, and that belief is what causes the improvement (similar to how "finding religion" helps people), is that not enough?

Although I do agree that obviously just because they've internalized this experience, that doesn't make it objectively true.