Bitcoin happens to currently use power that way, other coins don't; mining is not the only way to facilitate transactions and facilitating transactions is where the value is, regardless of the method used to do it. Power is but one of several options so the value can't be there.

Newer mining equipment doesnt use as much electricity. Power is a variable but not an important one.

Regardless, power is used to run the equipment. There's a correlation here.

Our whole economy relies on energy, which ultimately comes from the sun, theres a correlation, doesnt mean its important as you are trying to imply