There are 195 countries in the world and only some like US are like this. Miners will always choose the best option available to them based on electricity cost, labor cost, regulations, taxes, climate, etc. When things get hard in a country, the hashrate located in that country drops while it increases elsewhere.

BTW the grid can only detect big mining farms that use a lot of electricity which is abnormal not all miners that are smaller and use far less electricity which is not so different from normal usage.

There are a lot of countries with super cheap electricity and price hasn't changed that much in the past couple of years either. For example the electric company where I live recently released the detailed rates sand for home users it is about 0.002 $/KWH (for big cities such as the capital), there are cities with lower rate of 0.00074 $/KWH.
The above values are for home users and there are certain conditions (such as overusing electricity) where the price rises but only slightly. The last electric bill I paid was about 30 cents (google tells me the average electric bill in US in 2019 was $118 to $115 per month LOL).
The price for certain industries are even lower, for example the rate for agriculture field is as low as about 0.0005 $/KWH