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Yes, true, as far as we have witnessed with regard to Earth's life forms. I happen to be a rather passionate recreational enjoyer of the HFY (Humanity Fuck Yeah) subgenre wherein one of the common tropes is: "what if the earth is actually an obscenely challenging planet for life to have arisen upon (a 'deathworld')" such that all the other sapient life forms in the greater cosmic neighborhood are horrified by how things operate around here

I mean yeah it's just a fiction trope but we don't know for certain if things are like this anywhere else in the universe, and not taking it for granted makes for some really fun storytelling into which op's entire post plays extremely well. So while it's common for earth life to have many symbiotic arrangements, it's just plain fun to consider aliens looking at this and going AAAAUUUGGGHHH WHAT THE FUCK MAN OH MY GODS WHAT THE FUCK

Especially as we hug the crap out of them.