What isn't surprising, because up to now, grid storage was only profitable in very few niche cases, and for a very short time. Besides, there has been no government program to invest on those.

So you are saying that there is some business that has always been certain to lose money, and had never had government help, and nobody ever invested on it. And you are using this fact to suggest that in the near future, when that business will become needed and profitable, nobody will invest on it either... what isn't a conclusion one can make.