Cite for that? That's simply not true. In fact of all major infrastructure media in modern society, electrical transmission is by far the cheapest to upgrade. Even discounting industrial electricity and adding on DC charging of the EV, my household usage has gone up 35%.
You really don't think society can absorb a 35% growth in one infrastructure sector? That's just silly. Obviously there are "costs", but there's no justification for "can't handle" or "massive". At all.