Eh, get a phone with Gorilla Glass. It's damn near impossible to scratch. I've launched my phone directly into pavement many times without any damage. If AT&T weren't dirty POS who cut off service to force me into using a spyware-ridden Samsung garbage phone that has a soft screen that scratches when you look at it, I'd never need a new phone.
Most of Samsung's flagships also use Corning's Gorilla Glass, and I don't think it really offers the same degree of shock protection as a case. It holds up to scratches about as well as a tempered glass screen protector, but it doesn't protect the back of the device or the sides. Gorilla Glass or not, I still use a case.
This isn't remotely true. If you happen to wear diamond earrings you'll realize this real quick. My SO got a brand new Pixel 6 Pro and within a month the upper portion of the screen was visibly scratched up after some earrings received as a gift. Gorilla Glass still scratches with daily use, even outside of diamond.
Well, I've had multiple phones with gorilla glass 6 and victus(?). No scratches. Then I bought a Garmin fenix with "diamond like coating", and suddenly my phone had a gigantic scratch. Turns out it scratches even with the lightest touch of the watch. Hard things make scratches with just a slight touch on any modern phone, but most things won't.
Meh, my OnePlus 8 is still scratchless and in perfect condition. Rubbing diamonds on glass is going to scratch it, I'm not sure why anyone found that surprising at all. The hardest known material is obviously harder than Gorilla Glass. Pavement isn't made from diamonds though.