Replace the word “furry” with “cosplaying”. Is there Ironman-Spiderman porn? Yes. Is cosplaying just about this? No.
Being a furry isn’t always about sexual stuff. It can just be about being cute and silly. For example, you’ll see kids wearing furry ears, tails n stuff like that. U’ll see kids talking about their “fursona” (a description of what their furry alter ego would look like). Being a furry is primarily about art and just doing fun stuff.
Now, about furry porn- an artist is probably going to draw dicks n boobs some time in their life. Humans are generally very sexual creatures. They’re going to introduce sexual stuff in practically anything that they do. That’s furry porn. It’s not because being a furry is about porn- it’s because being a human is about porn.