No, there are (or, at least can be in principle) various good reasons for thinking physicalism is true

We still don't have a physical explanation of qualia. So it is still a kind of guess that physicalism, which has been successful in other areas cab be extended to all areas. It's an intuition based on evidence, but the intended intuition of the Mary story is based on evidence as well, since we have all had novel experiences which went beyond their descriptions.

If you think physicalism is false, I would not think the above explanation would feel very satisfying to you

Can't I just find it unsatisfying anyway?