> We need to remove the existing subsidies on renewables which made sense in the early days, but not now. Let the generation sources play at the even field.
This is also factually incorrect (unless Spain are now doing some country level subsidies on renewables). Fact is, new solar and new wind offer the lowes average power generation costs of any method. Regular market forces (without susidies) will favor renewables over anything else. Hydro being the most profitable.
> Properly accounting for those externalities and adding them to the cost of renewable generation is possible, but politically unappealing.
Implying this was/is not done and should be done. As a certified fan of looking out for (cost) dependencies, I agree with this to put it very mildly. I find it unlikely this wasn't done however, rather, I think renewables were likely onboarded harder than the externalities were taken care of to allow for it, possibly due to political pressure and/or mismanagement. Or at least, that rings all too familiar to me personally, not just from real world topics, but even from work. But then what you actually propose is:
> There should be a limit on how much intermittent generation we can have depending on the preparedness of the grid and we should pay less for power from such sources, not guarantee purchase from them!
Which is a different concern.
Also, this reads to me awfully like just flowery language for "hey, what if the obviously bad thing that happened wouldn't be allowed to happen anymore" with the logic retconned into it, but then I'll never have a way of proving or demonstrating that conclusively.
Finally,
> We need to remove the existing subsidies on renewables which made sense in the early days, but not now. Let the generation sources play at the even field.
This further doesn't follow from even your own explanation (i.e. "which made sense in the early days but not now" is not a substantiated claim). It's just your own political stance on the matter to the best I can tell.