you can't replace the legacy financial system without replacing legacy financial instruments. it's impossible to do that without offchain smart contracts. this is also going to enable people to create pointless tokens and other things. there's nothing you can do about that. better start getting over it soon. pigeonholing all of defi into the "shitcoins" designation proves your ignorance.

there's nothing wrong with having a smart contracts ZK rollup on top of bitcoin. it's a good offchain scaling solution and it's the best way to keep useless tokens and NFTs out of the base layer. rollups are the most popular offchain scaling solution in the world right now and people even use them to make simple payments.