We are talking about privacy, not security, like when being individually targeted by the state or someone else, that’s another topic. Privacy-wise the main source of information about you comes from apps that collect all the information available (which is huge), they sell it to data brokers which in turn sell it other companies that tipically try to sell you something or want to know your habits (like your employers). If you don’t use their apps they can’t collect information about you and sell it, and that happens when you migrate to free software. Only location will still be collected because mobile service providers log it and sell it, but there are ways to mitigate that too.
We are talking about privacy, not security, like when being individually targeted by the state or someone else, that’s another topic. Privacy-wise the main source of information about you comes from apps that collect all the information available (which is huge), they sell it to data brokers which in turn sell it other companies that tipically try to sell you something or want to know your habits (like your employers). If you don’t use their apps they can’t collect information about you and sell it, and that happens when you migrate to free software. Only location will still be collected because mobile service providers log it and sell it, but there are ways to mitigate that too.