Anyway, I don't want to go too deeply into this, so I'll just say you're actually not far off from what I'm saying. What saddens me about "This is Water" is the fact that it's so close to something that might have been really helpful to him. He's talking about these daily experiences, and noticing how he's feeling. He feels bad. That's good; feeling bad helps.
And what he thinks next is... You have a choice of how to feel. Think about everyone who feels even worse. You can decide what you care about. Don't think of an elephant.
That isn't CBT, nor anything therapeutic-- that's depression, at its most pernicious and deadly.
The attitude taken toward that speech, and by extension toward that sentiment, by the smug asshole in TOA makes me almost fighting mad.