You're absolutely right, when it comes to individuals. The whole concept of an individual "carbon footprint" is literally just corporate propaganda to deflect responsibility away from the actual offenders, who are primarily energy companies. The top 20 carbon-emitting corporations are responsible for ~35% of all emissions. [0]
Individuals have very little control over most carbon emissions. Outside of choosing to have fewer children, and transportation-related activities, there really is very little an individual can do here. [1]
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[0]: https://www.theguardian.com/environment/2019/oct/09/revealed...
[1]: https://iopscience.iop.org/article/10.1088/1748-9326/aa7541#...