It's not the PMs being rogue evil; they (and the engineers) are serving their employers faithfully.
Another reason is that a local app can spy on you more (track your location, for example) to collect data to sell, harass you with notification spam, and display non-blockable ads.
Another reason is that a local app can spy on you more (track your location, for example) to collect data to sell, harass you with notification spam, and display non-blockable ads.