So because you don't see anyone upgrading the powerlines by your house that means that there is no work taking place on the power grid?
https://www.sibelga.be/en/about-sibelga/projects-challenges/...
The rest of Europe has 230V, 3 phases + neutral, with 400V between phases.
They even stopped allowing people to connect their solar arrays without large batteries because the grid is that overloaded.
(of course they're doing work on it - but definitely not the sort of work required to allow everyone to charge their 1-3 cars per household).