Bitcoin's founder solved one allegedly insurmountable problem: the Byzantine Generals' problem. It's irrational to believe this means Bitcoin Core's development team, who had no part in the original design of Bitcoin, will solve more problems of this class.
Bitcoin Core should have fully exploited the existing breakthrough in decentralized consensus, by simply raising the block size limit to provide enough space for the world to use Bitcoin, instead of pushing Bitcoin's luck, and premising its success on an uncertain technology like LN.