Can you explain why existing batteries don't store energy well? I don't have to use energy to crack natural gas or water. I don't have to worry about the hydrog

Can you explain why existing batteries don't store energy well? I don't have to use energy to crack natural gas or water. I don't have to worry about the hydrogen leaking out and catching into an invisible fire. I don't have to carry around a tank with enormous pressure, because the hydrogen isn't very dense as an energy source. I could just say we'll solve all problems with green batteries. We can recycle batteries at > 95% of materials already. We have lifepo4 batteries that are stable, don't have cobalt and be charge up to 100% without destroying them. In reality I don't have to point to some unknown incredible improvements in the future, they work today. I see hydrogen as the oil industrial complex and diesel & ice industrial complexes wanting to maintain all their infrastructure that burns fuel for engines. It makes sense from their standpoint.