I disagree. It isn't lip service.
It is NOT your personal decisions that are ruining the planet. Only collective action can do that and so only collective action can address it.
The term carbon footprint was invented by British Petroleum to fracture and confuse people who desired a more beautiful and sustainable world. It worked like hell. Insanely effective. Still showing continuing efficacy even when British Petroleum behaves with such ruinous irresponsibility they had to change their goddamn name to try and make people forget who they really are.
You should be a responsible consumer to the degree you can. You should make choices to signal your own preferences to the world, to remind people that a better life is possible, and to reward the businesses that behave well. You should not be shaming and gatekeeping people who fail to behave their best by holding them to incredibly unfair standards like "if you can’t act with any level of personal responsibility, how can you be a good advocate for corporate responsibility". You absolutely, 100% can be an a good advocate for corporate and collective responsibility without having good personal behaviors and we NEED the people who behave exactly like this if we want the planet to have a future. Because we need their votes. And people who gatekeep and shame others for their perceived bad behaviors drive them away instead of calling them in.