While you do need to close/open payment channels if you want to move the funds off the lightning network, I don't really see why you'd need to "periodically" do it. Lightning channels can stay open indefinitely so you can theoretically park your money on there indefinitely.
If someone sends me 1 BTC and the transaction is recorded in mysql, the database operator can revert the transaction and I have zero recourse. That's not possible with lightning. If someone sends me 1 BTC over lightning, then decides to reneg on it by trying to commit an older state of the channel (where they haven't sent me 1 BTC), then my recourse is to rebut that transaction with a newer one.
