When I had a MacBook, I was quickly compelled to do something about the fact that its sharp edges scraped things, most notably scraping off the surface of my fingernails.
I wasn't thrilled with a product design that required a case to protect the rest of the world from the product, but it obviously makes more sense than trying to file the MacBook yourself.
I have thought about filing/sanding my MacBook forever and getting a case to solve the problem never even occurred to me. I feel a little silly now because it does seem obvious, but also to me just filing it down sounds like less work than picking out a case.
But the obvious way to handle that problem is to put it in a case. For example: https://www.itslaut.com/products/crystal-x-case-for-macbook-...
I wasn't thrilled with a product design that required a case to protect the rest of the world from the product, but it obviously makes more sense than trying to file the MacBook yourself.