These are two entirely different points. In the case of nuclear, I was only making the point in response to the question that a single focus on nuclear isn't the answer. Even in France where the power sector has been largely decarbonized by the application pf nuclear total national emissions haven't fallen by that much. This is because of the use of oil, gas and even coal in other sectors.
In the case of renewables, much of that industry still remains in its infancy (although not all) and our own analysis of historical rates of deployment of new technologies (and their supporting infrastructure) doesn't point to renewables as being ready or able to fill the gap in sufficient time.
If anything this is a bias to the status quo, but that isn't sustainable either due to the level of emissions.