Phasing out oil and coal production would be great, but that's a task for politics. It is still a collective action problem though since any such agenda needs to gain popular support in a democracy. https://en.wikipedia.org/wiki/Collective_action_problem As individuals we can both take some actions to reduce climate impact in our daily lives and also support movements and campaigns for actions on the political level. No contradiction there.

no, it's not ecologically effective to bomb all the oil platforms. That would actually be an ecological disaster.

We don't need to stop production. Reducing/ eliminating demand will work just as well.