Again, I repeat my competition argument. I understand your point that opening a channel won't be a thing for the average Joe in the future, but if the "channel opening" class is still in the thousands or more, they will compete with each other and drive (and keep) fees down in a fee war.
I also agree with the need for more layers. The same idea of bigger but more expensive transactions that we are discussing with on-chain will also happen with the LN. I can picture a future of large Fedimints using LN to settle between them and users mostly using minted tokens for their day to day interactions.
But I still think that LN will remain cheap because of competition. To be honest, I don't think the price of Bitcoin doesn't have that much influence in what LN Routing fees look like.