[imtringued]

Although you are correct I feel like you skipped over an important detail that is crucial to your argument.

The power consumption does not depend on the block size.

Securing blocks has a cost that is independent of the block size. Bitcoin Cash is a good example.

I also find it interesting that Bitcoin Cash is not as prone to deflation which means that in theory you could actually use it as money. It never caught on so it is effectively dead though. It's best to forget about it.