I have to agree with him tbh.
I just handed in my dissertation yesterday and it was made clear from the get go that supervisors have more than just one student to supervise. Moreover they have other things to do other than to supervise, such as teach classes, prepare lectures, provide feedback for other classes and so on. Has to be remembered that more often than not they are also probably a researcher as well as a lecturer.
If you keep in regular contact with your supervisor, and don't f**k them about, they will be more than happy to help you if you need it.