I did not say Fed. Supp. cases are are not used by other courts. I said they were not binding on other courts. they could be cited favorably, or unfavorably. It isn't a one way street.
As you should know, a decision in one US Circuit is not binding on another Circuit. it may or may not be influential; but it is not binding until the US Supreme court makes a determination on the issue.
If you are so certain of your position regarding the precedential value of a case published in the Fed. Supp., all you have to do is cite a US circuit court opinion backing up your claim. the fact is, you know there is no such case.
US District Court Judge 'A' is bound by a decision of US district Court Judge 'B', even within the same judicial district.
That's fine. I will accept your interpretation of your words.
But (since you seem to have some familiarity with the subject) I am sure you also know that "precedent" does not necessarily mean, or equal, "binding precedent." Precision in the written word is a worthy goal.