The point wasn’t to denigrate solar, but to demonstrate the fallacious beliefs you’re operating under.
Yes, the plant owner will want to maximize the profit of their investments and get as quick a return as possible.
If gas/coal was held to the same exact safety, environmental and waste disposal standards as nuclear, and they should, then those would also need to be run at max throttle to justify the initial expense and have significantly shorter lifespans. It’s a “plant trees under whose shade you do not expect to sit” type issue.
Nothing you have said is an argument against a solar in the day + nuclear at night type of setup. It would certainly be a huge improvement over building out more CO2 based generators.