We you figure out the amount you will be surprised because the number is really small if you compare it with visa transactions.
I don't think it is realistic to compare bitcoin throughput with the throughput of a major credit card network.
Visa's transactions are stored in a centralized database. By contrast, all bitcoin (on-chain) transactions are broadcast and stored by every bitcoin user with a full node. Granted, LN will aggregate transactions together, but the decentralized nature of LN will not allow scaling to reach "visa" levels.