That's a strawman's argument and in theory would apply to anything in the context of overall society if it was true which is clearly not the case. Because if you really lived completely carbon neutral for decades, you'd probably appear in dozens of TV shows and magazines will have exclusive interviews for you. (Not sure if it's exactly NYT, but you'll sure attract interest) So other people see that and realize: wow, it's actually possible to survive for decades in a carbon neutral way.
In reality it wouldn't be that extreme but it's always a domino effect: your colleagues, friends and family see what you do and be at least lightly influenced by it. Be it just the fact that you do something that people thought would be not possible.
After all, that's how democracy works and how movements grow. It's not that your vote only depends on the campaigns but also on your peers' opinion. It's not that movements in the past haven't been succeeding.
> I won't change my behavior, because I think my effect will be negligible and I'd just be like the Amish, being pious while others enjoy.
Well yes, but this is what I mean, the Amish have an effect. Yet I don't think it's not necessary to live like an Amish. Probably it's fine to just pick the next pricier product. A few percent extra paid don't hurt, have a good effect and will promote these products both towards sellers and other buyers.
Maybe not by their own initiative but I mean there are countless YouTube videos among them and Amish versions of popular songs as well as Southpark and Family guy episodes depicting Amish life style. Our media has quite a bias towards extreme life styles...
They also mentioned the stat that if 1 person lived totally carbon neutral for 70 years, that would offset only 1 second of current global CO2 emissions, which I'm going to presume is sourced properly.
I'm not very optimistic. Politicians follow the polls and go with what's popular, and if the people living in the rich nations have to pay more to fly to Asia for cheap holidays, and iPhones, etc, get more expensive because of carbon tax, the majority probably won't support the governments and will instead vote in populist idiots that will make things "great again". In the poorer countries, being told that the decades-old luxuries they've envied from richer nations will cost more because of government policies will also not be popular, never mind that the policies are meant to save the future.