Pedophiles and non-consent are a couple good reasons not to.
It’s ok to share with family privately for sure. Publicly to the rest of the world, got to ask why would a parent do that? Probably to gain attention for themselves, it’s not for the child or considering the child. They are essentially starved for engagement and attention and using their child to satisfy that need. That’s the problem.
Simply put the strangers that want to see your child are not always for good reasons. Why do that to them?