well, they think they don't. until their pii gets leaked all over the internet because whoops our s3 bucket was publicly accessible, or until the service goes down because whoops our llm deleted the prod db...
PII leaks are normalized now. Most people aren't even aware, or just shrug "oh well" and head to the app store to download the latest gacha game or whatever.
Don't get me wrong, tech is why I am here. But if it works, Alice and Bob don't care one bit about how the product exists.