I think it’s obvious when a singer is genuinely expressing emotion and when he is using a ‘technique’ to try and sound like he is. For ten years at least every other singer in a vaguely alternative guitar band has been doing that whole quavering at the edge of his range thing which was first popularised by Chris Martin doing a bad impression of Thom Yorke. It’s just become a tired trope in the same way that excessive use of melisma is for unimaginative R&B singers.
I would guess that I’m not the only person that finds it irksome. Sufjan Stevens doesn’t need to do it. Just think of the depths of devastating emotion in the way he sings something like John Wayne Gacy Jr. Are you honestly saying that would be better with a bit of straining in it?