It’s a simpler solution, though the trust then is transferred to the smart contract itself, as well as the entire security of the ETH chain. I’m not against any solution but want people to understand the risks. The DAO hack was not something insignificant to forget. All these new dapps need to be security tested and continuously audited, it only takes one small mess up and your super secure Bitcoin loses all of its properties.
I think in time ETH, other smart contract chains, LN, wallet and exchanges like Square and maybe soon PayPal, and even traditional banks, will all help to scale Bitcoin. Eventually even Bitcoin will perform upgrades that can even help the other services and wallets that continue to run on top of bitcoin. The best part is the user will have the choice to do what they want.