Muun, WoS.
Yes, they exist, but so do child accounts with banks.
8 billion channels?
Run a node and stop going from one extreme "WoS" to another "8 billion channels".
How does VISA cope with 8 billion transactions per second?
How does HSBC handle bank accounts for 8 billion people?
Because you understand the fiat world, you understand how stupid these questions are.
It would be nearly impossible to explain how stupid these questions are to somebody that knows banks or VISA exist and are responsible for the world banking and that the world population is 8 billion.
Understand, your statements / questions in this context.
The world bank perhaps does a dozen transactions a year, your local branch does perhaps a few dozen transactions a day.
Neither worries about the 8 billion people on the planet.
If I send a lightning payment to somebody, it may route through a few other nodes, it might not, but it has no effect on the lightning network at all, neither does Cashu, neither do mints, neither do institutional transactions.