I agree with you.

The reason I think it may not be unethical is the T may simply say she feared the client and so could not ethically continue the therapy or would cause the client harm. That seems to be a blanket reason that is used to justify a Ts actions.

Another example how the ethics work for the T:

T dilemma: it's too hard to work with this client, I want the easier clients. i suspected this towards the beginning when I took on the client, but needed the income from the client.T further rationalizes the client works full time so issues can't be too serious. A year into therapy, deeper issues are uncovered.

ethic reasoning to terminate: don't have the specialized skillset to continue to work with client