I can promise you the energy industry knows about both CapEx and OpEx and has incredibly in depth models on them for all relevant energy technologies.

And on the topic, I can also promise you that they do in fact know about the concept of capacity factor and that the sun doesn't always shine and the wind doesn't always blow.

And on the topic of France, their reactors oveheat the river they use for cooling and have to shutdown. And just as you claim you can't soley consider the cost of a plant, you can't solely consider the smokestack emissions of a plant without consider the mining, enrichment, handling, and disposal of nuclear.

Germany has a large CO2 output because they have a large manufacturing industry, and for policy reasons technically decoupled from their investment in solar, they also maintain production capacity of a dirty type of coal as power source because they have it in abundance within their own borders, its a security interest.

If you think your armchair analysis has outsmarted the energy industry then go ahead and invest in fossil and nuclear i guess.