Many of the people who "don't care" don't know. Once you inform people about how much data meta has on them, for example, many of them do in fact care and they are in fact disturbed by it.

Now, they tend to continue to use meta's products because they have become essential communication tools for those people, so in fact, many people would welcome regulation that allows them to continue to use key communication tools without the sleazy privacy violations they weren't aware of.