I disagree.

My point was that, just like with renewables, a 100% nuclear grid doesn't work either.

They can adjust power but they're typically used as he load with some other source dealing with the peak load needed a short time a day. Typical peak capacity can be off in the middle of the night for example. Nuclear doesn't like that.

I'm not saying you can't. I'm saying it's typically not used for that because it's not flexible enough. Wikipedia seems to agree with that https://en.wikipedia.org/wiki/Load-following_power_plant