You are conflating too many popular terms incorrectly while trying to make your point. Baseload as defined by Wikipedia that you cited does not contradict my p

You are conflating too many popular terms incorrectly while trying to make your point. Baseload as defined by Wikipedia that you cited does not contradict my point, you don’t seem to understand the nuance of what economic demand is and why that is different from an attribute or minimum design spec. It isn’t the consequence as you originally declared, it is an attribute of the grid itself. That’s a very important thing to understand. Anything can provide that input to the grid, but that means the source providing input to the grid must meet that very basic design specification. Flexibility of generation capacity coming online is easily compensated by other parts of the grid such as the storage or load shifting characteristics of the grid.