Honest question, maybe I am being stupid here, but why do people insist on counting solar+storage costs per MWh, when LCOE already takes into account that the s

Honest question, maybe I am being stupid here, but why do people insist on counting solar+storage costs per MWh, when LCOE already takes into account that the sun does not shine at night. So when you pay for electricity from solar and the price is 40 per MWh, the fact you will not get anything at night is already baked into the price. If you could get solar at night, the price would be half of what it is now. So it should be either solar or storage costs because you only pay for one of those, and the price in case you use each for half the time is basically the average of the two. Yet I keep seeing people argue against solar by simply stacking those two costs on top of each other.