That is all true, presuming they haven't just paid the PIKs with another set of loans with similar conditions, albeit probably a little lower interest. If they have done that, then they haven't paid them off at all, have they, and what you say is a load of rubbish.
So, can you see how the question of how they have paid them off is not irrelevant, it's crucial?
No, they don't have to tell us. But without doing so, there is no way to portray this as some kind of shattering of the "myth" that they have no means to repay the loans.
So, either we hear the details, or the Glazer hurrah boys (I like that one!) shut the feck up about having won some kind of victory here.