I suspect it's because people get a bit tired of every article on infrastructure challenges getting responses along the lines of "They should just do this thing that I just read about that sounds really cool!"

Chances are that the possibility occurred to at least one of the numerous technical experts and professional engineers involved in the project, and there's a reason that's not the favored approach.

Sometimes it's because the linked idea has other complications that aren't actually that much easier to solve than the present complications (hydrogen is notoriously difficult to store, because it's so dang small, and it's pretty volatile too), and sometimes it's because a super cool emerging technology that might become the standard for the future isn't actually ready for large-scale deployment, because people literally just figured out how to make it work (why don't people simply have large batteries in every home to balance out grid loads? It seems like a really good idea!).

Sometimes problems are hard, and as smart as I'm sure you are, I don't know that you're smarter than everyone involved in this project combined.