Storage capabilities exist and will continue to improve. We are still very much in the infancy of renewable energy as a globally adopted energy source.
Obviously, it takes non-renewable energy sources at some point along the chain. Obviously, there is going to be a carbon net negative in the upstart of these industries. I am not so dull as to miss your whataboutism, but...
We have to start somewhere.
The endgame is to be carbon neutral and to minimize our impact on the earth and its finite resources. Are you saying we shouldn't even try at all? Should we just continue to be wholly dependent upon fossil fuels? Throw our hands up in the air, buy cars manufactured before 1975, rip out their catalytic converters, then do laps around the country?
We do stockpile it and we would. I've referenced this link for a third time now, but they discuss what effectively answers your second question.
Bow down to the oracle, he listened to a left wing NPR story and knows why he is talking about.
Not...