They don't re-invent anything with this DeFi, maybe it sounds good for some, but as you have said it has no utility or use or whatever, and will be just a tool to make more money for some businesses, whales, manipulators and just make the market more of a game for the big boys now. We can consider it a boom for now, but we all know what is going to happen if it's saturated again, it will be the biggest crypto bubble. Actually it's already is, with billions of $$$ flowing.