Imo it's because finance is unique. Many arcane sounding things in this field are over-engineered/over-complicated smoke and mirrors. Their underlying ideas are usually unbelievably simple and the implementations are often hilariously sloppy, but many people get paid a lot of money to maintain the illusion of sophistication. This drastic contrast makes it a comedy gold mine for someone who can see these things as they are. It also makes it possible to explain those smart-sounding things in almost jokingly dumb languages while still being pretty accurate. This is much harder to do for a more rigorously structured field where the smoke and mirrors don't take the center stage.