Taking this approach, many might find school work is, largely, effort done to grade a level of understanding the individual has of the content. On the other hand, one might find business work is, largely, effort done to accomplish a customer's request. Additional less common types of each may come up as well, and there are, of course, exceptions to the main theme of each. In general though, I think you'd agree swapping the goals to say "school work is effort done to grade whether someone understands the content while business work is effort done to see if the particular person you make the request to is able to complete it on their own" seems rather unlikely in comparison. Because of this, swapping who does the work in each case results in different treatments.
No, the assumption is that the purpose of education is to prepare you to be able to function in the real world. IMHO learning how to get other people to do your work for you is the single most valuable skill one could possibly acquire.
Even if we took this line of thought as the truth though, also came to an agreement this is the most valuable skill of all to teach, and also took it as being universally good to do regardless of context, what's the reasoning for assuming college only seeks to teach and grade success on a single skill in the first place?
Yes, and this is exactly the problem, because in point of actual fact most people who go to college do eventually leave. And if you think about this even for a moment, it has to be that way because someone has to do the actual work required to maintain the the civilization that makes college possible in the first place.
Certain domains, such as budgeting, use it as a synonym for "allocate" but given the context it was first used in your comment it definitely implied "taking without consent".