>Most users, probably, do not care either way (because they do not understand the implications). But the business (e.g. Google) cares about ads personalization

>Most users, probably, do not care either way (because they do not understand the implications). But the business (e.g. Google) cares about ads personalization a lot, because ads personalization significantly increases tax revenue and reduces number of irrelevant ads that users see. This is exactly the reason for the GDPR. Users don't understand the implications and so they shouldn't be automatically opted-in to systems that violate their human rights.