The iPhone is capable of playing plenty of mobile games downloaded through the app store, but can't play a mobile game that came through some other channel, so

The iPhone is capable of playing plenty of mobile games downloaded through the app store, but can't play a mobile game that came through some other channel, so the closer analogy is "my Ferrari has 600hp and can go 200mph down interstate A/B/C, since they were inspected by Ferrari, but is prevented from driving on interstates D through Z because they didn't jump through the hoops to get inspected by Ferrari".