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I dunno. I was suicidally depressed all day every day for nearly 20 years, and there were people I love who were very consistently supportive. As always, ymmv, but saying it has no basis in reality is false. If the human actions in this post did not exist, I would be dead. Instead, I made it to middle age.
It doesn’t always happen, but there are people that back up feeling the way the post describes with action.
I had 18 years of constant suicidal depression. I’m better now. It’s not guaranteed, but it’s possible.