Those have to happen if Musk has any intention of fulfilling some of the things he has said so far. He is repeating over and over that one of his goals is Mars, and while Falcon Heavy can carry Martian payloads, it doesn't quite cut it. This and the other things that he have been mumbling are strongly suggesting that he intends to work on those (or similar ones) once he gets the opportunity.
Obviously, that's not now, since SpaceX is barely managing to start fulfilling its flights, and obviously, they might never reach the point where they would. But you can't say that they can't, you can't say that people counting on SLS don't have a slight reason to be worried, and you can't say that profit is required – Musk has even stated in the past that he's not hurrying for an IPO because it might interfere with plans that do not involve making a profit.