Appellate lawyers at the Supreme Court level are arguing issues without much consideration of the virtue or lack of it of the client. That's simply the way it is at those stratospheric levels. Incidentally, it is the way most Supreme Court justices view these matters; they are concerned to establish precedent which will affect the lives of millions of people and so the issue rather than the virtue of the individual appellant becomes very important.
How many partners were there in that firm and how did Ted Cruz vote? Did he even vote?