I wish tech companies knew more about me

The author argues that despite widespread concerns about tech companies' invasive data collection and surveillance, these companies actually use the gathered information remarkably poorly. Rather than demonstrating sophisticated personalization, the author catalogs numerous examples of irrelevant recommendations—being shown ads for products already purchased, receiving hotel suggestions from 2014, getting targeted ads for items they've never searched for, and experiencing constant language and location setting errors. The core complaint is that tech companies collect vast amounts of personal data but fail to leverage it effectively, suggesting their surveillance apparatus is less sinister and omniscient than commonly feared, but equally frustrating for its incompetence.