Individual change has been promoted for 40 years if not more. Promoting it isn't fixing the underlying problem, though I'm sure it makes some people feel better about where they stand on the self-sacrifice ladder when they have others to look down on.
It has been suggested that the whole individual change movement was created to distract the populace from the actual big polluters. Like answering the question of "Why do we keep extracting coal and oil?" with "Why don't you look at your own consumption and reduce that first".
The amount of frivolous waste I observe at the individual level, multiplied by the millions, is not insignificant.