While I agree with your base argument, I would argue further that the (substantial) transmission losses at least in the consumed and perhaps in the generated en

While I agree with your base argument, I would argue further that the (substantial) transmission losses at least in the consumed and perhaps in the generated energy also need to be factored in, so a simple x:(x+1) relationship is not quite sufficient for a robust claim of "100% renewables" which is based on offsets.