You fail to appreciate that my experience is not your experience.
Far too often organizations assume everyone else knows or cares about what they do. Once you are passionate about something, give to it, or work on its behalf, you are no longer objective.
In 2011, Newsweek Magazine gave a quiz to 1,000 Americans and 1/3 couldn’t name the Vice President of the United States. Chances are the VP gets more media exposure than your org.
If you’re going to assume, assume the person that is going to read, hear, or see your message knows nothing about what you do. On your website, and in your marketing messages describe what it is you do (or problem you hope to solve in the world) for someone who has never heard of you before. Start with something more universal and invite the audience to join you.