The amount of energy used for the Bitcoin Network is tiny compared to the amount of money to print, mint, guard, secure, etc for say fiat currency.
For now, perhaps. But how big would this energy consumption be if the bitcoin network were as big as a traditional major finanical company like, say, Visa? We should strive to do better than fiat is doing, not merely being not as bad as the traditional system.
Visa doesn't mine coins, their network has nothing to do with the creation of money, the banks do that for them. Your comparison is flawed.