Everything is going well just means nothing bad has happened yet.
Read about hacks and malicious takeovers in defi and understand for yourself that putting your BTC at risk on another bridge is NOT the same as securing your Bitcoin on chain itself.
There is a reason BTC defi has not taken off, simply said,,, there is no bridge yet that offers the same PoW security as BTC itself.
DeFi is just a smartcontract that will execute some operations. There are people trying to do so in Bitcoin for some time, like RSK.
Bitcoin is more flexible than it looks like at first. For example, USDT was formerly a Bitcoin Token until a few months ago, when they move basically all stash to ethereum/tron network (you can still some usdt transactions in BTC chain
here)
DeFi has some interesting implementations like Uniswap, a decentralized exchange. I would love to see some innovations similar to that in bitcoin network, although I don't know if that is possible. Maybe in a few years, with the lightning network.