Is Bitcoin-lightning still not scalable? Bitcoin verifies about 220 million transactions a year. Even when using Lightning, wouldn't I want to verify my Bitcoins at least once a year on the Blockchain? With 8 billion humans verifying once a year, wouldn't it take on average 40 years to get verified in the blockchain? What if you're forced to close a Lightning channel?
Wouldn't this make the Bitcoin use not secure anymore?
Yes.
But with the coming  taproot upgrade and schnorr signatures we can create a single Bitcoin tx that is n - of - n multisig which enables us to do multiparty channels with n participants in 1 transaction. So if you take n=40 we can onboard 8bn people in 1 year. If you choose n=480 we can do it in 1 month. So let's keep fingers crossed for that Bitcoin upgrade.