Keyboard Coating: A Rant

Virtually all keyboards that are made (well, let's focus for now on black keyboards) have this rough-ish coating on the surfaces of all of the keys. This coating overtime becomes undone by the abrasiveness of our fingertips, resulting in unsightly spotty shine everywhere.

From an aesthetic view, it's irritating to the eyes.

What's the benefit of having this coating?

Why does the industry continue to use this if it results in something so unsightly and displeasing?

If I had to guess, the coating is there so that the keys can be labeled their appropriate letter/function--couldn't there be a better way to do this?

Just a minor thought I wanted to bring up.