At least in the US, you'll want to be careful with these views as an employer or manager. At least some cases of depression will be classified as a disability

At least in the US, you'll want to be careful with these views as an employer or manager. At least some cases of depression will be classified as a disability under the ADA, leaving your company open to a discrimination lawsuit if you make employment decisions based on it. (I've read the ADA, but I'm not a lawyer -- this advice could be completely wrong in practice)