Let it begin: everyone clamoring to explain why they don’t need to use a dictionary. They know how to spell. They know the meaning of words (or can figure them out based on context). They have spellcheck or Grammarly. Yes — I’ve heard it all, and I still think everyone who writes should write with a dictionary open.
I'm not the sort of person who really does house guests. At least not frequently or well. And when I have, at least half were memorably Bad Guests. Or Nerve Wracking Guests. Or Why-The-Hell-Did-I-Agree-To-This Guests.