Usually purely technical solutions to societal problems won't bring you far. It is still not bad to have them, because they essentially show what would be possible, if we just wanted. Helps in discussion as well if of all people Tim Berners-Lee was part of it.
However: we have issues of education around the topic and our jurisdictive let's the big internet corps get away with too much. Starting with taxes and privacy down to the societal effects their algorithms have.
What ad networks do is the digital equivalent of filming and spying on people who walk by your storefront. What they do, how they do it and the effects it has on society are wrong. Online Advertisement is probably one of the big drivers of the political division we are seeing lately, because controversial topics produce more engagement and more engagement is what people selling ads want.
If you'd explain the current practise to common folk, most of them clearly don't think is okay. This means both education and media isn't doing their job.