Why would you ask fossil fuel companies about the cost/benefit to begin with? They are a biased party

It may feel cathartic to lash out at perceived “evil” entities but you accomplish nothing that way. Some prefer perception of justice to actual results though, so to each their own.

I think you’d find a world without fossil fuels has quite a bit more misery than the one we have today. Green transition needs to be well thought out and planned for, not taken lightly