By your logic, no black justice should rule in any case involving race discrimination - since it will/might involve/benefit his/her family, I respectfully disagree.
Plus, AND MORE IMPORTANT, RELEVANT and ACCURATE, according to CNBC:
"Of the nine justices, only Clarence Thomas would have granted Trump’s application for an injunction blocking the release of the records to the select committee,
at least temporarily until the court could hear arguments in the case."
Thus, the MERITS of the issue whether a current President could block the Executive Privilege assertion of a prior President WAS NOT BEFORE SCOTUS.
Again - not that the facts ever matter to the Trump/anti-Trump sycophants - according to CNBC:
"
Wednesday’s ruling by the Supreme Court did not determine the ultimate questions of whether and when a former president can obtain a court order blocking the release of records, despite an incumbent president saying they can be released. The ruling noted that those questions are “unprecedented and raise serious and substantial concerns.” " (DAMN RIGHT they do - and these are EXACTLY the kind of questions SCOTUS is supposed to resolve - if we believe in our Constitution. Can't wait for a future President to be asked if Biden's assertions of Executive Privilege over text messages with his son about the Russian computer fiasco will be accepted or rejected. What then? The rules will "different" - that's what.)
It is also entirely possible that Thomas - after hearing arguments about that issue - would have voted against Trump's argument anyway.
So once again, the Great Trump Mind Control Virus means nobody gives a shit about THE LAW - its just about TRUMP, and whatever rules apply to the other 330,000,000 citizens should be ignored and special pro or anti Trump rules should be made up out of whole cloth.
YOUR argument (1) is wrong about the MEANING of Thomas' vote, and (2) SPECULATES that he KNEW his wife's communications might be responsive to a subpoena, and (3) SPECULATES that that his wife's "involvement" was the basis for his vote.
Shame on you. A teacher should know better.
CNBC Article
Text of SCOTUS Opinion