

That’s the point. The backup needs to produce (close to) 100% of the demand 2% of the time.
And coal plants are incredibly bad at quickly reacting. It takes a day just from ignition to working temperature, several days to establish the transport chain constantly providing the huge amounts of fuel needed (bonus points for a lot of them being ship-based and possibly suffering from low water levels).
Also there is a lot of industry that will already need climate-neutral gas produced by green energy as their only valid way for electrification. And in the end it’s also a cost issue. If the industry already needs huge amounts of gas and the transport network anyway (of which a lot already exists - refitting natural gas networks for hydrogen has already started) the state doesn’t need to pay much than just the power plants. And they are comparably cheap (the exact opposite of nuclear where constrution is expensive but fuel and operation are cheap).
Nuclear is a fairy tale told by lobbyists. Those working in nuclear and those trying to keep fossil fuels active as long as possible by inducing constant idiotic discussions.
Worldwide solar/wind/hydro made up ~86% all newly constructed energy production (and rising… those where numbers of 2023, I expect >90% for 2024 but haven’t seen newer data). Renewable deployment as well as battery storage is growing exponentially because no other method of production can actually compete with those low costs anymore.
Nuclear is an option for all the countries that already have massive capacities build (so basically France, that’s it). Or for those with a demand increasing so rapidly that they use all available options in parallel anayway (see: China, but even there nuclear is in regards to capacity a tiny fraction compared to renewables).
For every other country it’s basically a choice between starting to lower your emissions now and steadily over the next 1-2 decades via renewables or doing nothing for at least the same time period while nuclear power (that also needs all the costs upfronted now btw) is build. (PS: Nuclear also doesn’t work without long-term storage via produced gas btw… That’s the reason France is the other country in the EU beside Germany pushing for a scaled up green hydrogen market. In fact hydrogen production via electrolisation is the only reason their nuclear plans work economically, because that production gets better economically with a more constant power supply compared to a pure renewable setup - see RTE’s study about power production in 2050).