> The only reasonable conclusion from your logic is that it would have felt like an even worse idea to build nuclear reactors in the 1970's. Yet, using today's hindsight, it was a great idea.

Consider opportunity costs. If all the public money that Europeans invested to nuclear (it started way before the 70s of course) was put into renewables/storage r&d, we would have had great renewables decades earlier, and by now would be swimming in it.