It's frustrating when people fail to adjust their communication for different audiences. It really does show a lack of awareness about how others comprehend information. The truth is, effective communication isn't about talking "like usual." It's about understanding that people have varying levels of comprehension and adapting your message accordingly. You wouldn't speak to a toddler the same way you'd speak to a professor, and expecting everyone to grasp your message simply because you're saying it is a misconception. It's indeed a communicator's job to differentiate and tailor their approach. Read books as much as you can, please.