At its worst, unclear writing is almost as bad as not publishing the information in the first place. Writing clearly and making sure you comply with accessibility guidelines potentially benefits all of your readers.
Everyone wants an impressive vocabulary. There’s nothing like playing Scrabble and feeling intellectually superior for knowing ‘loquacious’ or ‘magniloquence’. But good writing is about more than frilly language and triple word scores. It’s clear, it’s snappy and it communicates a message with as few words as possible.