And that's just the economics of the gains; completely forgoing the cumulative costs burdened upon society by climate-change (increased heating/cooling-costs, early deaths because of pollution, crops failing and the mass-migration as a result of that). Continuing with fossil fuel is very very dumb if you look at the medium to long term.

True, although we shouldn't pretend that the cost for building a coal mine or developing an oil field is more single use than a solar farm or wind turbine. Many oil wells and coal mines operate for decades with relatively small operational costs after initial build out. Time in production difference is not statistically significant enough to make that a linchpin argument.

The jobs created by solar and wind in R&D, manufacturing, and construction and maintenance, along with most importantly the carbon emissions benefits are the most relevant economic points. Nuclear should also be part of the Green New Deal, but fossil fuel companies successfully fear mongered that sector to death.