The reason a ton of dams exists is not to make power, it is manage the river. Making power is a secondary concern.
But when we’re done with climate change we should of course restore as many rivers as possible due to the ecosystem damage they cause.
https://www.giss.nasa.gov/pubs/abs/kh05000e.html
And the worst power-production disaster in history so far was neither Fukushima nor Chernobyl, but the 1975 Banqiao Dam failure. And it's not even close.
https://en.wikipedia.org/wiki/1975_Banqiao_Dam_failure
The reason a ton of dams exists is not to make power, it is manage the river. Making power is a secondary concern.
But when we’re done with climate change we should of course restore as many rivers as possible due to the ecosystem damage they cause.