People on HN don't generally realize that energy has pretty much always been a mix and that adding new energy sources with different availability, slew rates (both up and down, and not necessarily symmetrical), cost, peak capability, base load capability and so on is a well understood problem that markets know perfectly well how to deal with.

Then there is the 'cool' factor ascribed to some solutions, an element of hope that a favorite technology will one day power the planet and all kinds of unrealistic assumptions about what is and what isn't technically, socially and economically possible. You are right that this is a difficult communications challenge but the level at which the discourse takes place is well below the minimum standards for taking part in such a debate.

We're talking about very simple basic and factual knowledge here we are still very far away from the complexity of say the 15 minute ahead market, balancing and long term cost projections of a particular technology, we are more in outright disinformation and denialism territory.