The point is that BTC network is for secure & decentralized final settlement. That's really the most important aspect of a sound money.

For daily transactions Lightning bundles those transactions (as long as the channel exists) into a live tally based in a single BTC transaction. The beauty is that the Lightning protocol even uses the BTC protocol to coordinate that live tally over a channel, without having to commit it to the blockchain at every update. You don't lose security much, in fact you actually end up gaining privacy.