They pushed for the shuttering of something they considered (and consider) an existential risk to life on the planet, and believed that movement towards renewable electricity generation would occur relatively quickly (which is now starting to happen, but did not happen as fast as they believed it would).
You can call it a failure of judgement, but it's not what was claimed in the GP.
Yeah I was more referring to groups that want to do X, and then when a new "hot button" item appears (climate change, anti-racism, poverty, whatever) they quickly release how doing X is the solution to whatever is currently in the news.
It's most obvious with companies, drinking Coke™ is always the solution, no matter what the problem, even if the problem is drinking too much Coke.
You can call it a failure of judgement, but it's not what was claimed in the GP.