It was enlightened centrism with edgelord characteristics even when it came out and "America Fuck Yeah" became a thing for blue curtain enjoyers to chant and then the spread into newly conceived subgenres like "Humanity Fuck Yeah" for the same blue curtain enjoyers to indulge in because hogs really, really like self-indulgent slop.
It comes from the Reddit-popularized concept of "the curtains are fucking blue," which is a thought-terminating cliche that declares that subtext, author-intended or not, doesn't exist or doesn't matter in literature.
It's gotten so long in the tooth that even some parts of Reddit started pushing back.