But that heat you speak of applies to any kind of long-running computation. Whether that be render farms, ML model training, distributed computing like BOINC, or anything else with similar properties.
It seems to me that crypto is being unfairly singled out. Things that are digital have meaningful existence.
Increasing efficiency is a huge aspect of every other field in computing with companies literally spend 10’s of billions of dollars increasing efficiency of software and hardware every year.
It’s directly offensive to many people in the field that an inefficient first implementation is maintained because people’s investments in hardware are considered more valuable than anything else. Not latency, not transactions per second, not environmental costs, just maximize the value of their hardware investments.
Completely understandable, yet still horrific.
Similarly, as I just pointed out different algorithms would use more or less energy and therefore be more or less efficient. Thus the heat produced is a waste byproduct mining, and electricity is the fuel. A more efficient process simply uses less fuel though it may have higher capital costs.
The same is true of say cars, you’re burning gas because driving is useful. But, increasing efficiency means less fuel while creating identical value etc etc.