What word actually is, for most people who don't need its advanced features, is an amateur desktop publishing tool. Word is for making fliers that you stick to the light pole. Word is for printing out notices that you stick to the coffee maker. Word is for writing pretty invitations for your 7 year old's birthday party. The same is true of virtually every "word processor" out there, including LibreOffice Writer. The switch from text editor to desktop publishing tool took place right around the time they started displaying page outlines in wonderful WYSIWYG. You don't need WYSIWYG if all you care about is the content, right?
But everyone has an inner artist, even though only a few are actually any good. It's amazing how much people (including myself) care about how their text appears on a piece of paper or a WYSIWYG editor. Sometimes, this distracts from the content. But as long as the content isn't being completely neglected, I think we should forgive people for wanting to control the font in which their writings appear, or for wanting their quotes to look "smart", or for spending 20 minutes tweaking the line spacing of their resume. It's human nature to mix a sense of aesthetics with everything. Word caters to that desire. In this respect, a PDF file is only marginally better from the point of view of the unfortunate recipient, and sometimes even worse.
So the problem isn't Word, it's people who abuse Word while performing tasks to which it is not best suited. For example, when you're sending a story to an editor, it's obvious that the editor only cares about the ASCII content and not your choice of fonts and margins.