[rtx]

I have done the same, here are some the reasons.

1. Better targeting by app companies when I am on iOS device.

2. Trust in the Apple app eco system

3. Most top apps are paid, so it makes it more acceptable to pay

[arvinsim]

That's why Apple is so afraid of sideloading. Because it threatens their business model.

[valuearb]

And their developers business model, and their high customer satisfaction levels.