Those same would-be stranded assets are already costing the world incalculable amounts of human misery, suffering and deaths from air pollution among other bad things. Stranded assets will be inconsequential compared to the saving of the Earth.
At the end it said “…stable phaseout of fossil fuels” but there must be a quick end to burning fossil fuels, or else there will be a very unstable phaseout of the human race along with most of the domesticated animals which make up 96% of the animal life on Earth.