Incredibly, the OP argues in favor of "wishing people smart makes them smart" by citing a famous example of a fraud! It conflates expectations of behavior influencing people who want to confirm, with expectation of success creating success.

As with most psych studies, there's probably a grain of truth -- of course investing in people tends to make them more successful, but it's not simple magic tricks.

I can't access the link — would love to read that paper. Here is a more detailed and nuanced article showing that it did replicate when the bias was unconscious: https://www.discovermagazine.com/mind/being-honest-about-the...

Also I never used the word "smart" once in the article. I talk about learning behavior and work performance instead.