LF: perhaps you’re right that the world insn’t so interested in you, but hypothetically if someone wants to blackmail someone for whatever reason, the more info they can find on said someone the more ammunition they can potentially have.
There was this Israeli/Russian recently in the Heimishe news that claimed he was a long lost relative to Frum families by simply googling genealogy websites etc. and knowing too much relevant info so it seemed plausible. (In the latest instance, he was supposedly the son of someone who died in the Holocaust, but he claimed the person was his father and survived.) Luckily, he only did it for emotional reasons, but such people can turn dangerous if let into homes etc.
Since the advent of the Simcha websites it’s almost impossible for today’s young couples to not have a “public face” for posterity, and most don’t want it.
Additionally, you claim to be a “shtikel” musician. There are likely multiple videos of you on line, which can be used with facial recognition software to find you elsewhere.
So we can’t hide, the world is more creepy than we realize, but it’s simpler to just block it out and pretend we’re not at risk. Hopefully the chances are low, so nothing bad will happen to any of us, but it doesn’t negate this fact.