Ever since I was a kid, I've always overprotected my stuff.
Always.
That habit stuck with me until now, so this is completely normal to me. With my iPhones, I literally buy expensive, high-quality cases because... well,... they cost hundreds of dollars. I understand that the phone's beautiful design is hidden within the cases, but honestly? The fact that it exists inside the case is satisfactory enough for me.
The other thing for me is that, if I see one scratch, dent, etc. on the device, I'm going to feel bummed out about it and it will make my experience using the device a little less enjoyable for me. I know I know: first world problems, but I want my devices to look just like the day I bought them, so I'm pretty weird in that regard.
I don't know if that answered your question, but that's just my two cents on the matter.