But, to add to PT's statement. This isn't just an ISTJ attitude. I think it is an attitude of those who are of the "norm". It's very, very hard to explain to someone what it's like to be clinically depressed such that you truly cannot get out of bed, for example. You can't know this unless you've experienced it. I have. And my ISTJ husband took good care of me at my worst. But then got tired of it and said, why don't you just get over it?
The guy he described seemed like an INTP, to me. Socialy shy, a loner, reading books no one can understand, but aceing the exams. But, how is he to know what it is like to be something he is not? He may very well have nothing in his experience to show him. He's strong, well built, and an SJ, a more common type.
Some things you really can't understand unless you've been there.