I agree, but we also need a storage system that can move around, and the aggregate scale of that is inherently more than enough for grid storage. This is why I'm not going to rule out hydrogen despite it having not worked out even back during the 1973 OPEC fuel crisis when alternatives were desperately needed and nuclear power (which is useful for among other things electrolysis) was The Future.

(Also, on paper one doesn't need any grid storage, if only we could get governments to cope rates on a planetary grid. Texas doing it's own thing and Japan having two frequency zones shows how hard this would be in practice, but in principle it can work just fine).