I don't understand it honestly. People say it's so expensive, but is it really? For this miniaturized supercomputer that does anything and everything that's with you all day, can connect you with anyone and anything from anywhere, that's a fully featured camera beating out dedicated cameras costing the same, that you look at a hundred and fifty times a day? We used to spend $1000 on a desktop computer that did a fraction of that and wasn't portable.
$1000 plus some AppleCare coverage is hardly a reason to cover a device up in some cheap protector. You're not carrying the Declaration of Independence, it's a tool designed to be used. I'll pay $29 to get my screen fixed if I mess up badly enough to crack it, but in owning nearly every iPhone across the 15 years they've existed I've probably cracked 3, maybe 4 displays and I'm not gentle with my gear. No case or screen protector on any of my devices to date.
And seriously, use the device for you and stop worrying about some person who will buy it from you in 2 years. Heck even the iPhone Upgrade Program doesn't care about wear and tear from caseless use. They'll take a phone back for trade in with scuffs and scratches as long as it is not cracked.