You'd have to be willfully misinterpreting the intent to think this was aimed at people dealing with personal loss.
I get the guy's intent. Some people will like and be excited by this. Some people will feel sad and guilty. But even if he only had the first group in mind, he's addressing the whole world. The reaction from ecopoesis is a valid one, because it's not the message he needs. Where we aim doesn't matter as much as what we hit.
It would take some serious self righteousness to take this as a message to the former.
The issue I had with the response was the direct attack on the author's intent e.g. "fuck this".
There are plenty of other comments that state their disagreement or why it didn't land with them without taking it to the level of shutting down the op.
I don't understand the need to diminish the attempt at a potentially helpful mindset. It's helpful to some, pointless for others.
"Fuck this" is not an attack on the author's intent. it's a valid reaction to how it lands for some readers. If the pressure is nonexistent for you, great! But people other than you are also reading it.