You are totally right. Broadcast professional editors were not generating the kind of revenue that Apple predicts can be gained by shifting their product to a much broader range of customers.
Its simple business – if Apple does not make profit they will cease to exist. They are a business just like you.
If you were editing films for client X for many years, and now you are not making much money from client X any more. Clients A, B, C, and D come along and for a lower fee you can do their projects in the same amount of time it took to do client X, and your aggregate income will increase. You would be an idiot not to do it.
What I am trying to say is you will try to keep long term clients but after a while if that long term client is not enough to pay the bills you will have to drop them in order to pick up one that’s more lucrative.