All of the current histrionics that we hear from DeFi advocates regarding escaping the evil centralized Banks and Regulators and what not -- you know what they remind me of? They remind me of what I hear from junior developers when they're tasked with fixing an antiquated, broken software system. These developers typically lack the experience and the patience necessary to fix the system incrementally from within, so…
This DeFi thing is big, large, involves money, teh future; is probably bubbly. There's not a lot to understand IMO. It's a wave of emotions wrapped into "tech". It's wise to treat it like a ~thing and see how it evolves.
I think the more likely explanation is that it's a way for people who own crypto to borrow and lend.
It's probably one of the first things to be built because there's a lot of people with crypto and banks don't want to accept it as collateral.