You absolutely, 100% can be an a good advocate for corporate and collective responsibility without having good personal behaviors
Frankly I disagree. Someone like that can say all the right things and vote the right way as long as their personal behaviors aren't impacted. But what will keep them advocating for corporate responsibility once the stuff they want to buy becomes more expensive?
Telling people you can support corporate responsibility and keep consuming the way you do today is a lie. Because corporate responsibility means producing less means consumption becomes more expensive means your standard of living goes down. And anybody who supports good environmental policy as long as their personal behaviors aren't impacted will at that point reverse course.
No, I think a true environmental movement has to start with the personal and moral. People need to believe reduced consumption is a moral good for both people and corporations. And then they vote their values and accept the consequences and the personal becomes political.