Operating at less than peak capacity doesn't make burning coal any more healthy, and doesn't make the decision to not retire them any more safety-oriented.
And you are still lying about coal being the only replacement for nuclear.
But read the article and look at 2020-2022: coal energy generation increased while nuclear decreased:
https://substackcdn.com/image/fetch/w_1456,c_limit,f_webp,q_...
This is a situation incompatible with a policy of increasing safety. Increasing safety means shutting down unsafe sources while keeping or rolling out safe sources, which is the opposite of the short-term trend. So the short-term policy goal was something other than safety.
"the short-term policy goal was something other than safety"