It may be a simplified view, but I see it as part of a statement that changing power structure to be able to regulate these industries is more important than individual actions. That is, the status quo has these corporations running free controlling the govt, but only curbing the pollution at the point of production is what will bring non-negligable change.

So, if changing your individual actions takes your time away from building left power than that's not worth your time. Of course, do what you can if it is doable within your capability.