Sure and some people take issue with aspects of how the world runs and want to discuss it.
> If you want to hold it against them then you are basically ranting...
Bold to state that making a critique of the status quo automatically amounts to "ranting".
> ...against all of capitalism rather than anything specific to "big tech".
It is not unreasonable to critique capitalism.
When you understand that, you know that is not how the world runs and is actually very specific to big tech as they pioneered this hyper specific shift. You do not have access to everyone's information who sees your billboard. You do however have access to exactly how many people in a certain area during a certain time with the income between 50-100k who are older men who enjoy football, has seen your digital ad. Hopefully that illustrates the difference well enough.
From 2018 to 2022, 95% of HN comments on the subject were against any form of Ads. Those who stood up for ads, were the absolute minority.
But then I guess you are right. Because those group of people are also the ones "ranting against all of capitalism".