Things are always inevitable until they aren't. The ozone depleting was "inevitable" until it wasn't. I don't find this "tragedy of the commons" style argument very convincing when you know that what you're doing is harmful.
> The number one goal of humanity should be to find or create sources of energy that give us orders of magnitude more supply than there is demand.
Agreed. That's in the future. Right now, however, there is an environmental cost to energy usage that's simply being ignored. Costs should always be balanced with what they produce. Currently, the environmental cost of bitcoin is far exceeding the benefits, and the vast majority of people participating aren't even concerned with any of the benefits of bitcoin other than trying to make a buck.