I’ve never seen Ethernet cable being stapled, ever. Or any other cable for that matter.

Your always put it in a sheath and fix the sheath with whatever you want but the cable is free.

Putting the cable naked inside the wall is barbarian.

Ummm you've never seen NM / Romex staples or low voltage wire staples? Really? Seriously?

This? You've never seen this? https://www.homedepot.com/p/Briscon-1-in-x-1-2-in-Zinc-Plate...