Thanks for bringing this up, it’s very interesting!
But can we really say that if every person can’t have their own Lightning channel, that mean Bitcoin can’t be global money?
When I talk to friends I get the impression that the majority of the people would be afraid of having the responsibility to self-custody.
And, after seeing your post, I get the impression that solutions like the one proposed by Fedimint npub1uq70uqgas9pyhds2zt57kr9se8rg3s68ztphjnq82ts8rzeknmeql7u0c and Cashu npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg will be inevitably needed