It's not quite as bad as that, as electricity is a more efficient fuel source for many applications, including heating if you have a heat pump and the cold side isn't a lot colder than your target temperature. For transport it's much more efficient - 1kWh of electricity will get you a few times further than fossil fuels containing 1kWh or energy.
But your point is still valid, we certainly need to more than double grid capacity if we want to rely on electrification to avoid lifestyle changes.
Especially as solar and wind are not consistent (clouds and windless nights etc), so you need to overbuild by large factor, and considering that there is no viable way to store energy, that requires insane overcapacity, on the order of 10-20x of current electricity use.
Electricity currently supplies 20% of our energy needs.
Please outline how you are planning to, in the next 20-30 years, scale world-wide electricity production, as well as the capacity of the electrical grid by 5x.
Nobody has even the foggiest plan for how that is going to be done. I understand that it's easy to just shrug, and say: "Someone will figure it out". That isn't very comforting to me.