Yes I do. Why? Because they handled it for hundreds of years, and it works all day everyday.
> No currency in the history of the world has survived in the long run.
Yes, so?
> The number of transactions has nothing to do with the energy spent on mining.
The number of transactions is a measurement of efficiency.
> Besides, the LN can already handle millions, if not billions, of transactions per second.
Only between 2 parties, after opening a channel between them, which requires: A transaction. And neither party can use any of the funds transmitted via the payment-channel in the wider network until the channel gets closed, which requires: Another transaction.
The banking system imposes no such limitations: A transfer can be initiated at any time to any IBAN in the world, with no prior agreement, the energy cost is miniscule, and the moment the transfer is completed, the funds are available to the other party for transactions to whatever other IBAN they want.