Built-in watermark support. When the system eventually gets hacked and the pictures end up in the hands of hackers, their use will be limited due to a "COMPANY + DATE" watermark plastered all over.
Reality disagrees with your theory though. Most companies that get their data breached are still in business and class action lawsuits aren't even a thing in most countries in the world (maybe the US is the only country that has that?).
The watermark is an extra threshold. It's like an extra bike lock, they'll get the bike with only one lock instead.
