Except they don’t. Companies that have built up enormous expertise and infrastructure in extracting fossil fuels from the ground will not win. There will (or rather, ‘would’) be a painful transition.
It’s pointless to deny that there will be winners and losers. The potential losers know full well what is at stake for them if a “green future” were ever to materialise.
It’s the main reason they fight tooth and nail to defend their turf. (Though of course, a capitalism where the energy industry was based on renewables was entirely conceivable. Not anymore of course, now that nothing is conceivable but an almighty shitstorm.)