'Privacy fetishism' - eh, no. People do care except tweats like yourself (remind me you need to be doxed and have your life ruined, maybe you will care then)....but that's beside the point.

Native apps can in theory do everything and more a web app does...but there is a big difference between an app platform which mostly serves to protect sec. interests and one which serves primarily ad networks and data brokers.

'it would just cost more' - fantastic, we want to discourage widespread data trawling, things costing more is an excellent way to do that.