I get that. I just don't think the tech is up to speed yet, for mass consumption. We don't have the infrastructure to support a mass-electric-conversion for society anytime soon - not just the charging stations themselves, but the power grid to support them and their widespread use, or the energy production capacity to supply that grid reliably.
I do a lot with motorcycles, and the big thing with electric motorcycles (and, to a lesser extent, automobiles)? Range anxiety. Sure, you get as far "per tank" (per charge) as you do on fuel...but "refueling" an electric is hours...not 90 seconds with a nozzle. And for the infrastructure aspect - you can find a gas station just about everywhere. Charging stations...not so much. And with the military, if they are going for the 'quiet' aspect...they're gonna lose that too if the batteries die and they have to use the fuel engine side of the hybrid. And, they will - because as noted above, there just won't be charging stations out there in the field of battle. Generators on base? Sure. But out on patrol?
As for the combustible/caustic comparison...you're right. So, it's a net zero, not some world-changing super advancement. Until you get to the battery's end of useful life, and then have to dispose of all the precious metals, and caustic "stuff" (which was strip-mined, in order to make the batteries to begin with). That's one big plus for petroleum - no disposal afterwards.