Okay, you keep approaching this with a abias, false assumptions and false premises.
This is the last I'm going to say on the matter:
1. "Nuclear power plants ... are bad at providing energy on-demand."
This is a lie. All nuclear plants, at least in Europe, are required to increase and decrease their power output on demand.
"according to the current version of the European Utilities Requirements (EUR) the NPP must at least be capable of daily load cycling operation between 50% and 100 % of its rated power Pr, with a rate of change of electric output of 3-5% of Pr per minute." [1]
Daily. Between 50% and 100% of its rated power.
The lie that nuclear power cannot provide energy on demand is a lie that people keep perpetuating.
2. "for the sake of the argument... a power plant that always works at 100% capacity... I blame an over-reliance on nuclear energy production."
If your power plants always work at 100% capacity, it's a failure of planning, not of the plants.
It's amazing that you brought up Germany in one of the comments. It just goes to show how biases make a person completely blind/oblivious.
Germany has shut down its nuclear power plants. Now it needs to burn ungodly amounts of fossil fuels and import ungodly amounts of electricity every time there's a windless night [2]. Because they decided that renewables are enough, are over-relying on them, and made no plans for when they are not enough.
This is colloquially known as "fuck around and find out". Aka "you can't attribute the failure in general planning to the performance of a single actor".
Yes, France relies on nuclear power. And yet, they have done fuck all: they have neglected maintenance of their nuclear plants for decades, they didn't plan for increased electricity demand etc. Much like Germany with shutting down their plants: they never calculated the actual electricity needs etc.
But people like you keep saying things like "nuclear is bad at providing energy on demand" etc.
[1] https://www.oecd-nea.org/upload/docs/application/pdf/2021-12...
[2] On the week when they celebrated shutting down their last reactor, there was a night when they had 0% solar production, and 0.2% wind production, both of which could be covered by just a single reactor from theos they had shut down.