

The problem with new PEI sheets everyone sells, is that they make the PEI so thin that it wears out so fast. It’s like when they go to cut a slice off the PEI tree, they damn near miss the whole tree. And the popularity of textured sheets doesn’t help either.
I have a smooth PEI sheet that came with my Prusa Mk3s 6 years ago. It has 1000’s of hours of print times on it. After about 4 years of heavy use, it just wasn’t much good anymore. And I didn’t feel like buying a new sheet, so I took the chance and very lightly hit with some 1000grit wet/dry sandpaper to renew the surface. It now holds better than when it was new. And I can probably sand it again if it ever needs it. But new PEI plates aren’t coated half as thick either. So my Bambu plates will have to be replaced at some point.
A lion can hunt because they come with weapons biologically attached. Humans not so much. And even you could fashion a spear with little effort. Which by your definition would make you a apex predator. And it did so for millennia.
I’m an old toolmaker that still has a small shop. I could make firearms from scratch if I wanted to. There is nothing special or complex about them. But I choose to purchase them from stores. So perhaps that demotes me from being a apex predator.