Did already everyone forgot the case where Apple insisted on the truth that they don't track you and a few weeks later one found a hidden file on the phone with

Did already everyone forgot the case where Apple insisted on the truth that they don't track you and a few weeks later one found a hidden file on the phone with the tracking info since it was bought? Apple told us that it was a mistake and removed every evidence with the next ios update. The only real privacy one can get is by not using apple, Android, Google, Facebook and so on. The others have to judge the tradeoff of having a powerful device vs. leaked privacy and being the product, not the customer.