Can someone explain why people put so much weight into written Privacy Policies? This isn't a comment about privacy itself—which I am totally "on board" with—a

Can someone explain why people put so much weight into written Privacy Policies? This isn't a comment about privacy itself—which I am totally "on board" with—and the documents obviously have some importance or use, but to read just so much into the minutiae of them, collecting them centrally or even refuse to trial a service because they simply copy-pasted from another service that had some awkward wording seems a little bizarre to me. This, however, might be just might be my British mindset (ie. no written consititution!) versus a US one..