The reporters probably agree that they are lucky to still be around to make the report. These communications, or lack of them, resulted in near-incidents. However, in an environment such as flight training, communicating clearly and concisely is not only a matter of learning the subject but also a matter of extreme importance for you to complete your job safely. By using these standardized words and phrases, each of which has one and only one meaning, ATC communications are eased and misunderstandings kept to a minimum. Even then real communication is not guaranteed, though.
Flight instructors have a much more difficult job.
There is no flesh on the bones. In order for CFIs to help people learn, they must develop clear, unambiguous ways to get their ideas across. It is a big part of your job, after all. It includes the basic elements of getting your message out as well as barriers to communicating effectively. Effective communications involves each of these interrelated elements and if only one gets mixed up, communication doesn't happen.