On the long term scale, absolutely not. Plutonium-239 has a half life of 24,000 years, a length of time 5x longer than all of recorded history. Can you predict what humanity and earth will be like over long time spans like that and that your low environmental drawbacks remain in effect the entire time?
I also have my doubts about your "low environmental drawback" assessment. When have wind or solar, etc. caused anything remotely like Fukushima or Chernobyl?
