The key to your misunderstanding is the "per transaction" part. It's a common misconception.
Now look at how much energy the whole financial industry uses. Put it on a line graph next to bitcoin's energy usage. You can almost not even see the blip of bitcoin's energy usage compared to the harm that the financial industry is causing.
Then learn how the energy does not increase as the transactions increases. This is a fact. The difficulty increases. It's mathematical. Read the white paper.
Then maybe you can finally see the lie perpetuated by the financial industry, which is a disaster to our environment compared to the greener alternative of bitcoin.
This analogy is only valid if you don't have a bank account.
It is valid criticism for me to say that I'm moving the bitcoin into the bank account, because that is the equivalent of dumping a truck load of motor oil in the lake, whereas bitcoin is the equivalent of dropping one drop of motor oil in the lake.
I also fly once per year. Honestly that's worse. I'm aware of the harm that I'm causing. I try to minimize it. But bitcoin is far better for the environment than tradfi companies.