It’s not harder to understand, it just has had less media exposure which means it feels more alien to the majority out there. There is a lot of nuance in anthropomorphism, most of it isn’t even sexualised and doesn’t count as furry. But the masses have an aversion to nuance.
Imo it’s very similar to drag, furries have an alt ego that just happens to be an anthropomorphic animal, period.
Saying that liking any of these shows makes someone a furry is about as right as saying you must be queer or something if you liked watching Ms. Doubtfire. It’s clearly trolling.