The Envato examples look like real hard-copy; but--truly--it's almost impossible to tell anymore 🤷♂️
Personally, I'm seeing these as real photos of actual prints on real tables with staged lighting
One can definitely print such products, and they can definitely look picture-perfect in one's own hands.
As perfect a print product as anything that you have ever seen printed . . . as long as you send it to the right printer <s>
Nobody does manual typesetting, anymore.
typespec.co.uk
I can't say it's easy, but you can "naturalise" your digital artwork so that it looks more, er, natural, and less perfect before you print it.
Of course, illustrating/printing such a thing--yourself--with pen, ink, acrylic, &c. is the only way to have it *not* look like it's from digital output.