Or the choice may between 'more nuclear energy' and total economic collapse. It's as matter of relative risk and determining which is the lesser evil.

Do we still have the luxury of a choice? The problem is not lack of oil reserves, at least not yet. It is that in the race to offset the decline of the flow rate existing oil wells, we can't install enough new oil wells fast enough to bump up the flow rate where we want it to be. How could the solution be the move to a totally different energy source? This replaces the oil flow rate with an electricity flow rate. This requires replacing not only oil wells with nuclear power plants, but also all the distribution and storage infrastructure plus the energy consuming devices. This just increases the difficulty of the task by an order of magnitude.

Given infinite amount of time, the replacement of oil with nuclear could perhaps be done. The problem is we are dealing with a race. If the transition is not done on time, then we have to deal with forced demand destruction.