We can see grade school and high school pictures of famous celebrities because pictures were taken with analog film cameras once. We can see old baby pictures of people who are 65 years old today because photography has existed for over a century.
Maybe you're not taking pictures of your daughter, but someone else will, and they can tag her with metadata for their own purposes.
I don't post my kids pictures publicly (I do to close friends), not for hyperbolic fears that someone might profile them and show them a targeted ad (The Horrors!), but because honesty, I've seen enough weirdos doing stuff with people's pictures online that I don't want them showing up on some jackass's website, especially ones people fap off to. Especially true for young girls, as there are people who steal portraits from other sites and they end up in spammy popup ads or worse.
But even that is a losing battle, as again, photos are taken everywhere by everyone. As the cost of cameras goes to zero, they will be omnipresent, and as networking becomes more and more ubiquitous, a world where you are always being filmed and classified is inevitable. It won't even require centralized governments or corporations to scale, just ordinary people filming decentralized.