No, we can build double the capacity if we build wind and solar now and the wind and solar will reduce or CO2 emissions while the nuclear plant is still in the planning/building phase, why should we build nuclear?
Do you have an actual argument? Offshore wind has a capacity factor of 60% that is close to nuclear power plants. If you locally distribute your generation, the chances of power falling to zero goes to zero.
I'm sure we can deal with a 30% electricity deficit that happens randomly with a few days notice. We can shut down unimportant things like residential power. No one really needs lightbulbs every day of the month after all.
Do you know what a capacity factor is? Do you understand how overprovisioning works and why we would also need it with nuclear power (at a much higher price)? Do you have any numbers to back up your once a month claim and 30% deficit or are you just making stuff up?