The 'I Fucking Love Science' crowd are a bunch of typical obese Reddit mouthbreathers who don't have the brains or experience to grasp how science really is (plodding, meticulous, frequently un-sexy) and have to dress it up as a big gee-whiz production as they circlejerk to pop-sci fluff. Another factor, if you ask me: the overenthusiasm and theatrics are also down to a bunch of sedentary, low-energy sad sacks putting on a farcical display to present a more romantic view of their own lives. See: Instagrammers, toy unboxers with cuck face / soy smile (not really thrilled by either term but whatever) and YouTubers who have to turn up the hollow smiles to 11.