Yeah that's fair. I am not very afraid of that happening indeed, it's not as if any of our neighbour's armies could not do whatever they want with us anyway.
The USA is in a good spot to do it themselves, but I did want to make people here think a bit about the decision and realize how they'd feel in this position. If you had to get your power from Mexico, Canada, and/or Russia (those places seem large and have realistic distances for cables off the top of my head), and be dependent on those three countries for your energy needs. Would that be desirable and worth the slightly higher price of fission energy? The situation is not comparable for multiple reasons but it seems like a factor to weigh in, even if it's a small factor and mainly applicable to my small-European-country scenario.