I agree, I think it will also make people a bit more cautious before declaring and it will also make attrition wars quite more cool...
Yet nuclear weapons should also be able to destroy projects, just like ground and naval battles, with the same or even a lower chance of it happening. I mean, nukes are supposed to be a weapon of "mass destruction" so it would make sense to give them (with the sake of RNGsus) this kind of power.