There are internal classes offered on writing better documents (and it's a great class). There's videos, guides, documents, everything. Writing well at Amazon is key to a successful career here. Got a project idea? Write a very good 1-pager explaining it and you've got a much higher chance of it actually happening. Want to share a design? Write a 6-pager (often 10-15 pages with appendices) explaining what, why and how you're going to build the system.
I've been in meetings that start with 15 minutes of silent reading, then 45 minutes of discussion. No PowerPoint presenting.
It's very weird for newcomers, but I don't know anyone who finds that it isn't better than the alternatives.