Jack's vision of bitcoin seems to be full of off-chain transactions. Where he'll be a major player of permissioned "bitcoin payments" through his company. Obviously bitcoin's blockchain is the only way to create truly immutable transactions taking advantage of bitcoin's decentralized infrastructure.
People can develop new technologies, upgrades, layer 2, 3, whatever new for improving Bitcoin protocol and creating new experience for Bitcoin users as well as companies accept bitcoin.
With me, if it's feasible to use bitcoin on-chain, I would like to move my bitcoin on-chain as transactions done on chain are more secure than offchain. Bitcoin blockchain is a strongest, most secure blockchain in cryptocurrency so why I have to migrate from on-chain to off-chain while it's feasible with me to pay on chain transaction fee.
Let's just say they both have their pros and cons but the utmost concern should be on the interest of initializing transactions without intermediary enforcement.
Agreeing to the Jacks concept might be a good development on the side of privatizing transactions which records are taken offline before deciding to translate it to the blockchain since miners wouldn't have the obligations to handle verification on their own. But looking at the odds, it's going to take some set of additional processes to verify transactions and same time reduces user safety and time consumption while the decentlization of bitcoin core will be hijacked indirectly.
I don't also think considering the lower cost transaction fees on the off-chain technology is worth attractive than communities security if prioritizing the essence of adopting bitcoin it decentlization potential.