My point is, the important part isn't assigning blame, it's taking actions that actually have some path to success. You really can't ethically consume your way out of climate change. Identifying the corporations and governments most responsible for blocking progress isn't a mere moral victory, it's focusing our efforts.

What's properly amazing is taking a slightly less well-paying job because it's on a bus route,

Sure, but not everyone can do that. And I don't mean it's just difficult, but literally there are a finite number of jobs and housing options that will fit that criteria. As our societies are set up now, it is not physically possible for enough people to make a sacrifice like that for it to make a difference. That's why collective action is needed to make those big structural changes in the first place.

And if these big companies have the economic system so stitched up that individual choices barely matter, then what on earth makes you think they won't have the political system similarly stitched up so that individual activism doesn't make a difference either?

Oh 100%. I'm deeply concerned that there may be no peaceful, democratic way out of this. But that's step 2. Step 1, regardless of what our strategy ought to be, is organizing. Whether we need voters, protestors, boycotters, or an army, we need people who are able to coordinate with others. It's not individual activism, it's collective action.