The gospel today opens with the words Jesus withdrew, reminding us of one of the most basic human needs, to rest. We are not machines designed to run continuously. We need, rest, retreat, vacation. Even the most extroverted person needs time alone. It is part of what makes us human.
I recall one of the most regrettable changes in the American English language, when we went from "personnel" to " human resources," a resource by definition is "Something that can be used," its value is linked to its utility.
While we can and should collaborate, humans should never be used. The value of the human is intrinsic. Even when we are too young, old, disabled or sick to be "useful", we are to be loved and respected just for being human.
Time apart, quiet time, is not wasted; it is essential. It may not make us more productive or useful but it makes us more human.