I’m not a huge fan of nukes for various reasons but dams have a number of problems not well appreciated by the general public. There is often an ecosystem issue (as they cut of migration of animals and plants) which can have cascading fissures, and can build up a reservoir of heavy metals, farming runoff etc behind the dam.

These problems have lead to dam removal (in he western USA at least) to restore fisheries and other resources.

Nothing is without consequences of course so it’s hard to praise or condemn any single approach.