The points you list are key, and a good starting point. I am not sure you need to add to that list but rather expand on the points to set them in a wider perspective.
There are several misconceptions that needs discussing. There is the idea that academic (scientific) writing is complicated and uses difficult language. Well, it does not have to be, and really should not be. With the huge onslaught of information, we must all learn how to express ourselves concisely and clearly. This is an art that requires training, not only in science but also in writing. Regardless of which sort of work we have, assuming communication is part of it, we need to be able to get our points across. Hence it is key to impress on students the importance of learning to write well. So point at the goals: being able to present information in a way that it can be understood by the intended recipients. You then need to be able to take complicated issues and express them clearly and in language that can be understood. Understanding terminology and concepts is the basis for being able to explain them and making necessary simplifications. Badly written reports will not serve the author, the company (equivalent) the author works for, or the recipients who need the information. I therefore think it is important to make these wider perspectives clear to students.
Companies usually have very strict rules for how reports should be written and formatted. Getting used to following such instructions may seem like a limitation, but understanding the necessity is a good preparation for the work place. With commercial reports come legal aspects that puts much restriction on how to express oneself. Learning about such rules and restrictions is therefore a key to become a successful contributor in the future, inside and outside of academia.
The fact that most (if not all) employers look for people who are good at presenting information, written as well as in speech should be emphasized (often included in social skills). These skills require much training and a solid foundation to build on. Courses in scientific writing and presentation as well as term papers and other reports (including a final thesis) are all parts of this education.
So, in the end, I am totally convinced that skills such as these will make a difference when applying for jobs. We just need to point out the fact. Getting feedback from employers about the necessity for these skills to share with the students is very valuable. Some students have better basic skills than others but none are good at writing concisely and clearly without the training we can provide. It is also important to make students understand that in the longer term they will have to develop their own skills, not just take whatever is served and think it is enough. It is a life-long learning experience which requires solid a foundation. and that is what we can offer.