I totally agree with this. A lot of places have cheap electricity in off-peak hours, as a workaround to this limitation (steady output).

I think that this obsession about intermittent power comes partially from the idea that any new sources of power must be drop-in replacements for the systems that we've had for so many decades. However those systems run the way they do as an accident of technology, not because of a careful analysis and design to match optimal usage patterns.