Probably because being tracked across all platforms is a bad idea in a democractic/liberal type of country, and not worth the "think of the children" argument. At some point parents have to take some responsibility.
> At some point parents have to take some responsibility
By voting for the party that promises to enforce bans against it?
There's more than one way to be responsible, and it's not good to be a "helicopter parent" even if you have enough free time to actually pair-browse the internet with your kid, and even if you did that doesn't stop them seeing inappropriate content or ads it just means there's a witness who knows they saw inappropriate content or ads.
Even voting is influenced by social media campaign as recently seen in Romania, Moldova and Georgia. The right approach is ban the behaviour and fine the perpetrators like the EU does. If you can't punish the perps, fine the ad delivery network instead.
First, I’m not sure being tracked across all platforms is actually a requirement here. On device age verification and device attestation and/or simply assuming anonymous users are under 18 from an ad safety perspective would allow a level of anonymity across platforms. It might also help solve a large chunk of ad fraud.
Second, I think you really need strong evidence to say that the upside you’re asserting is truly worth sacrificing kids safety.
