Suicide and mental illness go hand and hand...Mental illness is a disease of the brain...Most people contemplating suicide have something wrong with their brain. You are calling people who consider suicide weak. And that's weak imop.
He has no idea what he is talking about, probably some pimple faced teenage narcissist who was raised by some fundamentalist Christians. This attitude isn't new, it is the belief that if people somehow break any of the religions expectations, like killing themselves, adultery, drug addiction, divorce, masturbation, sex before marriage etc etc is that they suffer from a moral deficiency (mentally weak) and need to get right with God. It has been a ploy used by the Church since it's inception. Make someone feel guilty for normal human behaviour and then you can control and manipulate them. Nobody in Academia takes the religious self righteous thinkers seriously any-more.
The Churches role historically as usual is deeply shameful when you consider their view on Suicide and how they treated the families of those who took their own lives. The Church used to confiscate the belongings from the deceased's family. As a matter of fact, the Insanity plea was first used to try and stop these filthy Religious self righteous freaks from stealing the possessions from the dead man's family. Lawyers would have to argue that only an Insane man would kill himself knowing that his family would be punished and left destitute. This defence was used to prevent the grubby priests from stealing a dead man's loot. And people wonder why religion is despised, what type of organisation leaves a family destitute after one of their family members has killed themselves. The depths of shameful behaviour the Church will lower themselves too is bottomless.
Calling people who consider suicide weak is the equivalent of telling a teenage boy he will grow hair on his palms if he continues to masturbate. it's religious nonsense designed to induce guilt and repress natural urges or instincts. You can guarantee those that have never considered suicide are either very young, lived a sheltered life or have repressed it so much they don't even realise they feel that way. I once met a girl who claimed she had never thought of suicide but would occasionally get some strange thought to drive her car headlong into a tree at high speed. She obviously didn't want to acknowledge this as suicidal ideation as that was considered wrong, when I pointed out to her, that's exactly what it was she was shocked.
People don't kill themselves because they have a mental illness or because they are mentally weak, they do it simply because life for them has become too unpleasant.