What is too often left out of the discussion is the highly inefficient traditional establishment which are the alternative for currency trading and distributed financial activity. Most studies show that the traditional approach uses more energy.
I mean, what matters is whether replacing the entire financial system with Bitcoin would produce more emissions through mining than the system currently does.
Bitcoin is the settlement layer, tools built on top of it (like 2nd/3rd layer tech that can achieve 100K-1M+ transactions per second) require very little additional energy.