The only function nuclear has is to keep the profits flowing for the same companies that have been running all coal plants. It's really just the same people who were opposing renewables because "too expensive" in order to continue running their profitable fossil fuel plants. Now that it's clear that that gravy train is running out they push nuclear, because they would be the only ones being able to deliver (in contrast to both wind and solar which don't require the same massive investments that can only be pulled of by a few small entities).
The only problem they have is that the whole "renewables are too expensive" doesn't work anymore because they are actually cheaper, so instead they make up the baseload myth. Which already has a solution, overcapacity and investment into storage. In fact due to the long energy ROI for nuclear power plants, we would actually make things worse in the short term, because we need to use a lot of energy to build the plants. Solar and Wind are both on exponential curves (with no indication of slowing down), so why would we invest in nuclear? Use that money to invest in solar and wind (especially as long as we are still running fossil fuel plants), you get much higher CO2 reduction return on your investment.