Thing is the “they’ll commit suicide” argument does not in any way provide a rational argument that TRA demands are right. Threats of suicide have long been used by eg men to prevent partners leaving especially in abusive relationships, but whether it’s deliberately manipulative or not is irrelevant. It’s just not an argument.
If my view is that TWA not W, the statement that - if you do not agree, a person may kill themselves - is not persuasive in relation to my belief of that fact. It MAY make me feel guilty and even PRETEND that I believe it, but that’s different.
What it amounts to, for me, is if your self confidence is so fragile that a person stating a fact - not in a hostile confrontational way, but say on here, or social media, as part of a discussion on the issue - can cause you to take your life, then you really need help. It is not for me, or anyone, or everyone, to pretend those triggering facts are not actually true.