Technically, if you think about that, we're doing neurosurgeries to remove parts of the brains when necessary. I could imagine that severing the connection between lobes could affect someone's mental state in a positive way.

However, 2500 surgeries, some of them with great results, some of them resulted in deaths and many in between. It's a game of chances, not a science. Seems like this dude did not understand what is it exactly he is doing and randomly poked holes in people hoping it would work.

It would have been interesting to read a journal of someone who had the procedure.