Depends on the MSC.
I edit and schedule, though currently my primary focus is scheduling. I do edit the same client I schedule for (but I am not restricted to just editing that client). However, you are correct. In most cases, you will not hear from an editor unless they have a question, there is a problem, or if they are one of the companies that send feedback/grades at the end of a shop.
But, as I said, depends on the MSC. There are so many, and each is run very differently. Some use ICs for schedulers and editors. Some use ICs just for scheduling and employees for editing. Some use employees for scheduling and ICs for editing. Some outsource their editing or scheduling to a different company. This mix could even change client to client. Some telecommute, some have a physical office.