You're typing from a first world country where there are not huge cellular costs or speed limitations. If you go to other countries, even say, Botswana, the option to download over a gig in apps every (other) week isn't cheap. Bandwidth costs.
Don't worry, you can get to third world carrier really quickly by taking a Greyhound bus to Canada.
As a Canadian, to get 2.5 GB of data from a larger cell phone company costs me over $100 / month (there are smaller companies that will reduce that, but still, it's little data for quite a bit of money). I'm very happy I can force things to download only over WiFi.