Why? Advertising was a thing way before digital data collection and personalized ads was a thing. Let's imagine a current world where data collection was illegal. Do you think Google would make no money in this scenario? I am pretty sure they could still sell ads even if they were doing no personalized data collection. They could sell these ads based on where those ads could be displayed. So, instead of advertisers targeting specific demographics based on their personal data, they would instead choose what kinds of websites or search results they would like to display their ads in. Problem solved, no?

It seems like you are either too young to remember this, or maybe forgotten about it because of the norm we have been living in for so long, but internet existed way before personalized data collection, screw that, way before even Google was a thing, and we were still able to use the internet. Who do you think trained all these slop genarators if not the pre-AI small hobbyist and enthusiast websites that shared their knowledge with the rest of the world, usually for free. Hell, you are literally on a decentralized network of forums, most of which has been running by people paying for the costs themselves, or with the help of donations.

I would argue, something as essential as an email address should be a government provided service, since you can't even login to your online government services, or can't even open bank accounts without one.