Like people who screenshot pictures of other people’s kids on the internet and then claim it’s their own child....why?

There was a girl on this app who screenshotted photos of an Instagram famous baby (babyelannie17 on Instagram) and told everyone on here that it was her baby. She had her own pictures up on her profile and she was not this girl’s mother. She even had the little girl’s name and age wrong in her post because she isn’t this girl’s mother. Like tf is wrong with people? I know pictures that you put on the internet can legally be “stolen” but this shit is just creepy. Catfishing babies? Lol