> What happens when it learns that you're a hypochondriac?
> What happens when an insurance company goes to a data-broker and finds out that you've been googling cancer symptoms?
1) We cannot solely rely on Apple's selective definition of privacy to resolve these. As an example, what if your health insurance company offers an app and you use that app to search for cancer? Should the insurance company be able to use that data? We need very strong legal protections as a more comprehensive solution that works across all types of data companies can gather to make medical decisions.
> What happens when it learns that you have a gambling problem?
> What happens when it learns that you have a retail addiction?
2) You need to consider that (1) advertisers don't need to learn this! People willingly give them this data (e.g. by signing up for a sports betting app), and (2) this also opens the door to reach people to help them. No targeted advertising does not mean that these societal issues just disappear. These are still there but just harder to see.
> What happens when your ad profile identifies you as somebody who has had an abortion in one of the states where it's illegal? Can the ad company be subpoenaed?
3) While I abhor the decision on Roe vs Wade, let's flip this to: what if the ad profile identifies you as a seller of fentanyl? Would you want the ads data to be eligible for use in prosecution? I would. Saying that banning targeted ads protects women's privacy is security through obfuscation. That is not a solution.