They will probably just reuse LN channels and just settle them regularly. With enough transactions, maybe they would be settling those channels hourly...
Settled? You mean become actualized on the Bitcoin chain?
Yes, ...
Ohkaaay.... If the average channel is settled on chain hourly, then given current block size, you have limited the Lightning Network to about 20,000 channels. Not users, channels. IOW, I think you might want to work on your hypothetical scenario.
Current LN channel capacity limit is just a temporary safety measure... It will get raised as needed.
That's what used to be said about block size.
About your second point... well, if they were as evil as you sometimes imply that they wanted to cripple L1 and just move everyone to L2 they would need to raise that limit.
Mw wise old grandma used to say something along the lines of 'never attribute to malice what can adequately be explained by stupidity'. I don't know whether or not that is apropos in this situation, but the effects are the same upon the rest of us in either case.