It’s just so weird, I know many languages, some don’t use capitalization at all, sure, but all that do use it do it for names and start of sentences. Sometimes whether a word is a name or a noun is different from language to language (for example language names, some capitalize them, some don’t), but is a separate issue.
And languages make grammatical changes even to this day, it’s never too late to change something that has no benefit or hinders the usage.