Yuma Mask

It depends on what you mean by the word "relevant." Does it concern the fact? Does it teach me important things? Is it of value in terms of Torah study? You are only right about the first question, and even that is only superficial. Halacha refines ways of thinking and evidence and analogies from issues that can be hypothetical and very far from the subject at hand. Therefore, issues in the Yom Kippur Act can certainly have implications for practical halachic questions. In this regard, there is even a very well-known example (and there are many others), in the Osh that rules that a sick person who eats on a Yom Kippur Act does not perform kiddush, and his view is that the Rambam in the Osh Act wrote that on a Yom Kippur Act that falls on Shabbat, even the Shabbat adders are brought near by the High Priest. Of course, the issue on Yom Kippur Act 13 with the wives of the priest also has many halachic and scholarly implications.