Because a lot of people hate nuclear energy, and don't support building new plants. So it's not really a choice between nuclear and renewables, it's a choice be

Because a lot of people hate nuclear energy, and don't support building new plants. So it's not really a choice between nuclear and renewables, it's a choice between renewables and fossil fuel power plants. Besides, I think there's definitely a benefit to decentralizing the power grid, and to learning how to tap different energy sources. I imagine that there are places in the world where nuclear is not appropriate, but tidal energy is abundant.