This needs to be made clear to the community in the language that they speak. You listen to them. When you talk with colleagues, you use vocabulary and acronyms that are understood by 'insiders'. This will not work with the public and this does not mean they're stupid. It means that you need to take the time to be more thoughtful and to select appropriate images, language and metaphors to convey complex concepts.
All successful people develop good public speaking skills.
You should be doing everything that you can to become expert. This does not include reading books, by the way. You should be enrolling in courses or a get a speech coach to guide your efforts. You need active, guided practice to become an effective speaker. You won't be sorry you took the time to do this.