Also, we can build a nuclear plant in a desert country (where I live), but not much hydro. In fact, our hydro plants are generating less and less energy every year as our rivers are drying up.
Sadly nuclear plants cannot run without cooling water from rivers or sea.
True, but again there is Palo Verde nuclear plant that is located in the middle of the desert in Arizona and is cooled by sewage water from nearby cities.
Some new fast reactor designs don't even need water for cooling. Also, China has built an experimental thorium reactor in Gobi desert which also doesn't need water for cooling.
I believe a lot if interesting stuff is coming in a few years.
Just, not nuclear stuff.
What does that mean
A hydro plant can be attacked in a war situation just as much as a nuclear plant, so I don't see how that should be weighted as highly as you seem to imply. In fact, I'd argue that energy dependence on nations such as Russia are a much higher risk to geopolitical stability than nuclear power.