Yea ofc there is allways a too big. But energy makes a lot more sense over a big area. Not in form of a big power plant, but in a big energy network. If it’s sunny in one region and they make a lot more power than they can use and at the same time a different region has a power shortage, because it’s a cloudy day it only makes sense to share the energy. The larger the skale of your network the more efficient is your energy production. Less recources get wasted.
You are privacy focused and use apple? I think I have found your problem.