While the article was interesting, I wonder if the 50% of dropouts is really caused by people feeling like they are not smart enough. I've met quite a few peopl

While the article was interesting, I wonder if the 50% of dropouts is really caused by people feeling like they are not smart enough. I've met quite a few people who dropped out of good PhD programs, but most of them dropped out because they felt like they weren't in love with research and didn't think it made sense over going into industry and making a lot more money. I met one person who got into a top 10 program but never intended to finish his PhD; he just wanted to get a free Master's. On the other hand I also have heard from many that grad school is the first time many students have to see a therapist and deal with depression.