Earlier quoted context omitted.
"Selling your data" is marketing nonsense created for disinformation. Companies like Facebook, Google or even Samsung don't sell data. They collect data and get advertisers to pay them to target ads on their behalf. The user data never leaves their system (unless hacked, but that's a different topic). No, it doesn't bother me that they show me ads about products I'm actually interested in based on what they know abou…
They're selling access to the data, your data all the while you have little to no idea. The issue you raised about getting targtted ads is fine, I don't think many will dissagree with you, but its about having the option to turn it off. Theres the disconnect. When you're forced into an ecosystem that you cant tailor, it leaves a bad taste.
Facebook, Samsung and Google let you turn this functionality off. They're legally required to do so in parts of the world but they give this option to everyone.