You should note that this is more than a theoretical concern. The world spent months fretting about Mosul dam in Iraq, not that many years ago:

https://www.aljazeera.com/features/2016/12/11/mosul-dam-coll...

https://www.newyorker.com/magazine/2017/01/02/a-bigger-probl...

Until we live in a world where we can micro-generate terawatts of power on a fully distributed, dynamic electrical grid -- if that's even possible -- the only practical technologies we have for satisfying our hunger for energy involve concentrated areas of high potential energy. Big energy, big target.