You can’t complain about electricity loses without considering natural gas losses, especially the affect of methane on global warming
Why would you have to do one thing, then the other? Everyone agrees we need to both electrify homes and de carbonize the grid. However we also realize both are a long complex, expensive transition with many many pieces. It only makes sense to do both at the same time: an electrified house already reduces its impact on global warming, and just keeps getting better over time as the grid continues to be de-carbonized