Building dams literally kills whole ecosystems. Reduce biodiversity and razes woodland. They also do tend to take 10+ year of construction, just like nuclear power, while taking several times more materials. Your point is really stupid, nuclear power plants do not cause any more ecological stress than a moderate building in any city. They do consume vasts amounts of water, which can be an ecological issue, but not to the level that a dam creates. Wind turbines, for example, are not recyclable (materials used are too complex and use a lot of plastic) and they disrupt birds population. Just like solar panels, they have a very very short lifespan. Windturbines must be replaced every 5 years or so. So does solar panels but for different reasons. A nuclear power plant can create power for several decades if well maintained.
The thing is, no human intervention in any place is sustainable. Our mere mode of existence is so energy intensive that we are going to destroy the planet’s habitability no matter what we do. The time to change to 100% nuclear was 5 decades ago. The time to stop using fossil fuels was 4 decades ago. The time to change to sustainable energy was 3 decades ago. We lost the train. The planet won’t support us in any form in the long run. Hell, mammals might also be fucked within the next million years. The planet will never ever be the same it was during the past 2 million years. And it’s because of us.