Well it’s totally fine to have that opinion and use those devices, personally I wouldn’t though. Privacy is a niche topic right now and it might stay that way,

Well it’s totally fine to have that opinion and use those devices, personally I wouldn’t though. Privacy is a niche topic right now and it might stay that way, but I think more and more people will become concerned about what large companies know about them. Each individual service and datapoint is not very critical as you say, combining data from multiple sources and using the data in unexpected ways can quickly reveal very intimate things about a person though. Companies like Amazon, Google and FB do not mainly use your data to “improve your experience”, they use it to nudge you into behavioral patterns that benefit their business model (i.e. look at more ads or buy more stuff). I doesn’t take so much imagination to see how this might harm you e.g. because you develop unhealthy spending habits or waste large amounts of time on social media. And the more data a company has about you, the easier it is for them to manipulate you. So for me it’s not about defending against an unknown attacker, it’s defending against companies using my data to manipulate me, which they might do even if they keep my data very, very secure.