I'm not accusing the authors of doing this because I don't know much about this field, but it's worth being aware that even raw data can be biased.
Good point. And those were interesting omissions, I agree.
For the record, I am biased against centralized power grids. I'd rather see decentralized power grids and as a strategy for those I think RTG piles are a safe and well-understood technology for backstopping other forms of small scale renewable power.
Fission is just... it's too expensive for what it is. It centralized too much power with states. It's very dangerous when its safety is inevitably bypassed by industry that could never be held accountable for the tens of thousands of years of human no-go zones that it can produce.
At least it's feasible to provide high security for centralized nuclear facilities. (In the UK there's even a special police force for this.)
Edit: or on desktop. Can you post the link to the article you're seeing please?