Docx doc rtf and all those have a different purpose than pdf, word docs don’t even necessarily look the same on two different computers with the same version of word, and rtf doesn’t even attempt any kind of paper description, it’s literally only a rich format for text. None of these are a true “if I give this to someone to print I know what I will get” “portable document format”

I will look at fb*, I had not heard of them. Thanks!