Yes, hydrogen comes with its own challenges, but batteries and hydrogen are synergistic. Each covers the weak point of the other. Most of the energy stored goes through batteries (efficiency), while most of the energy storage capacity is in hydrogen (capital cost). So the system ends up being cheaper. You do not actually increase the needed generation all that much, because most of the stored energy is still going through batteries, not hydrogen. And in particular, unlike the only-battery solution you don't need to ludicrously use batteries for seasonal energy storage or rare event backup.