I think the author was reading too much into these questions. I bet these people came up with random questions they thought were deep, especially coming from a mental health lens, but struck a nerve in the author. They essentially weren't prepared for the raw human experience that was shared here.

I think regardless of whatever you face during an interview, true mastery is to let your humanity at the door and pull up a facade. If you cannot do it in that context, you dodged a bullet imho.. you wouldn't be able to recognize yourself a few years down the line working there with them daily.