Fossil fuel companies are run by smart guys who clawed their way to the top of their organizations by knowing what the fuck they're doing.
Those guys have invested most of their lives in their careers - and since the global oil reserves are supposed to hold out for another 50 years, and since they're not getting any younger, they'll be cashing in on all that hard work - so don't expect them to bail.
They have to be beaten - by political means and by economic means - because they won't just walk away from that kind of power.