That's not a mix-up and not physics, but the separate issue of providing balancing capacity to meet the difference of demand and total baseload production. And how does that not apply to conventional baseload? Baseload never meets demand anywhere near 100% of the time, and the difference can be rather big on occasion (be it a cold spell in a region with lots of electric heating boosting demand like in France in February this year, or a total shutdown of 52 nuclear plants following a natural disaster and subsequent safety concerns like in Japan earlier this year).

_{*Lunatic*, n.
One whose delusions are out of fashion.}