What on Earth are you talking about?
Look - it's very simple.
More transistors=more gates.
More gates=more capacitors to charge.
More capacitors to charge=more electrons need to be taken from one place and put into another place.
More electrons that need to be taken from one place and put into another place=more losses.
This is heavily outweighed by the reduced conduction losses at high loads. Even at low loads, modern modulators can actually turn off phases completely, both on demand and automatically. Search for "APS", "EPU" and the likes.
I still stand by that statement.