This is a fundamental misunderstanding that assumes a linear relationship between transaction capacity and electricity usage even though they are completely decoupled.
Here is a comment I made earlier addressing the comparison to Visa with actual resources it takes:
-They don't require everyone to hold the whole blockchain, you can have a thin wallet where the blockchain is held elsewhere.
-An ecosystem of multiple different currencies does create sharding.
-Merkle trees are a hierarchy of hashes so that someone can hold only the parts of the chain they want to look at and know that they are on the right chain by syncing large parts of it with their hash as a whole.
-At Visa level transaction rates of 300 Million transactions per day and the minimum size of about 4 transactions per KB in bitcoin, that means that at current 8TB hard drive prices it costs about $900 USD per year to store all the transactions. This would also require a steady connection of at least 870 KB/s to sync with the chain.
In short, there are plenty of solutions with even the extreme examples of involvement being very obtainable by the average person in a developed country.
