Profit smokes people's heads off, just like with anything related to it.
Banks are just there for the opportunity too, and it's our choice to give them such with our BTC.
People will give their bitcoins to banks, that's inevitable because banks have all the power and resources for that. The majority of Bitcoin holders are here for the money and the majority of them don't know how to use self-custody wallets.
Banks might have the resource but they lack the power. With DEXs and CEXs already available, most users don’t need banks. They will mainly attract those who are not familiar with self-custody.