Well, here's the fun part:
1. You might run out of space and, despite having backups and prepared for every other contingency, you might still have to take a risk. Scary, huh? One can never have too much in the way of backups.
2. Nice solution. But I doubt the one you're responding to lives in a padded cell. One can drop it by accident but that doesn't mean the thing won't break. And who said you would drop it, deliberately or otherwise? Somebody else could take it from your hand and whip it a good distance for sport. It might fall out of a holster/pocket/purse and crack... and in case you forgot, most iPhone cases don't cover the front touch glass panel... where's the common sense rant aimed at those companies for not putting on a simple flip lid, like how Cap'n Kirk's communicator works? We all buy and promote them and I've always inquired at stores and sent emails... much to zero effect...
Simpleminded certainties are pretty much useless once the entire realm of possibilities is analyzed... stuff happens, often outside of one's own control. Then again, if Ayn Rand preached self-reliance and called everyone else lazy leeches, but then ditched her own philosophy by taking social security (and tried to hide the fact by getting it in her husband's name) then anything truly is possible...