When you just make a blanket statement that everything is "symbolic nonsense" it's easy to assume that you're not interested in helping, but just one of the many people who has pivoted directly from "climate change isn't real so we should ignore it" to "climate change is inevitable and so we should ignore it".
I see that people like the articles author do feel bad about it, and do some metrics like that to feel less bad about it. None of the things the author did does reduce emissions. If i wanted to reduce emissions, i'd probably not even have the tech to show me the emissions charts.
I think this is come kind of coping mechanism. Okay if you need it, but i won't pretend its more than that.
Sounds like "symbolic nonsense to feel better about yourself". By reducing your personal carbon emissions a North American can probably go from 22 tonnes of C02e/year to maybe 5 tonnes CO2e/year. Maybe a little less if you really try. So you can cut maybe 17 tonnes / year * 80 years = 1360 tonnes over a lifetime. That's about the CO2 emissions of a plane doing 2 return trips across the Atlantic. If you're from Europe your baseline emissions are probably lower (by almost a factor of 2 between the USA and Western Europe) and therefore so are the potential savings.
Although cutting one's personal carbon footprint is a good first step, individual lifestyle changes aren't enough to make a difference. They're OK, but not more than that. Technical, cultural and political solutions are all required, and although there might be parts of the original article that are misguided at least it's trying to engage with the problem at more than an individual level.
Find more about this under the term "Climate Shadow": https://www.mic.com/impact/forget-your-carbon-footprint-lets....
But then again, if you really want to do something about at your own level, just travel less (be it for work or leisure), watch less netflix and don't upgrade your machines, just replace them when they don't work anymore. That'd be start.
I hate to say it 'cos I hate those punchlines, but this time, "less is more" :-)