Cases Look Worse in the Long Run
Some cases don’t last very long. Even if you buy a case from Apple, the MagSafe cases tend to wear and tear pretty fast — much faster than the glass and metal finish on your iPhone would. Considering how expensive they are, it just doesn’t feel like getting a case is worth it at all.
In the end, you’ll be walking around with an ugly-looking case that’s not really protecting your iPhone. The same goes for the screen protector if it starts to crack for no apparent reason — as many do.