You can't copyright basic geometric shapes either.

>there are plenty of perfectly legible typefaces that are completely free for you to use.

You mean there are plenty of bezier curved shapes which are within the public domain and no one can stop me. I'm not obligated to surrender my rights so you can turn typography into a business model. If you piss me off, I might just release tools that even stooges can use that copy the shapes out of the otf file, rearrange those completely so that no file fingerprinting will match, and has the user rename the files. I will go to war.