If gas is plentiful and easily obtained, great. But one of the better uses of wind and solar would be desalinization. Wind powered pumping, solar evaporation, and capture of water would appear to be far more cost effective, with gas as a backup when needed.
Where am I going wrong?
I can’t really argue your point because I don’t know the technical details of wind and solar.
I do know that Qatar built the Ras Abu Fontas A2 unit that is huge. It uses gas to turn sea water to potable water. There are quite a few others in the immediate region. So gas fired technology exists on a large scale.
I’m not familiar with the solar powered reverse osmosis on a grand scale to comment. ...... but I doubt it