I like this take. I'm still learning the technical details of how lightning works, but aesthetically it appears to be inherently centralizing, though yoh seem to be suggesting that even with loads of routes converging on the same nodes, there's still no way to influence the routing itself, and over time it should decentralize. Does that sound right?
I guess it could be considered a larger issue that custodial uses are going parabolic relative to non custodial.