It's true that there are tragedy-of-the-commons situations where not everybody has a battery, but it's also true that there are higher-level but subnational entities within the U.S. that have invested significantly in renewables + battery storage. This chart of where electricity comes from on a state-by-state level is illustrative:
https://www.nei.org/resources/statistics/state-electricity-g...
California, Connecticut, DC, Idaho, Maine, Massachusetts, New Hampshire, New Jersey, New York, Oregon, Rhode Island, Vermont, Virginia, and Washington are > 95% renewables + natural gas, all of which is produced in North America. If it comes to the point where it's "keep the lights on or sever ties with fossil-fuel states", I'd bet that they choose the latter.
(Note that the table kinda refutes your point anyway: the only states that are > 1% dependent upon oil for electricity are Alaska and Hawaii. Other than natural gas, which is largely produced domestically [1], the other big fossil fuel source is coal, which is also produced domestically.)
[1] https://www.eia.gov/energyexplained/natural-gas/where-our-na...
At >95%, it's probably a very different story. At that point, you basically turn off your aluminium smelter and you're good :) (And note how GP said "renewables", which gas isn't.)
And my point really isn't about oil specifically, it's about GPs "renewables increase sovereignty" thesis in general.
In the grid we have, where most people don't have batteries, nor a way to react to (or even perceive) network-side load shedding commands, you get rolling blackouts at best, and brownouts, damaged devices etc. at worst.