I've seen people saying they pay $0.03/KWh
In the UK that price is $0.32/KWh so largely prohibitive to do any large scale mining.
The price of $0.03/KWh is for enterprise contracts only. The price of $0.32/KWh is for the general public. Anywhere, you can get very low contracts compared to the public commercial value, it may not be as low as $0.03/KWh, but it is not impossible.
However, it is not the mining industry that has to force the cost of energy to fall, especially because it is not something that is directly in its hands to be able to do so. The mining industry needs to focus on what it has control over, and what it has control over is the mining hardware. This is where it needs to invest in research to improve.
Instead of investing in buying more machines, they should have used the money to invest in research.