No one should be confused that "Apple workers in Towson voted to join the IAM, fought for and won a contract" is in any way causal to the "declining conditions" in "due to 'declining conditions' at the shopping malls in which they are located." The o.p. somewhat dances around it with "Towson Town Center is genuinely in a state of decline and has lost many other major retailers in recent years, so it is very likely that Apple is exiting the shopping mall at least partly due to the worsening conditions." "Worsening conditions" is doing some major heavy lifting there… has a rising sea level begun lapping at the edge of the front door? Has a volcano sprouted up from the ground right out front? Is the store built upon a significant paranormal fault line, unleashing untold millennia-old evil? No, Towson Town Center could be Exhibit #1 in what is now commonly referred to as 'fatigue'.
The IAM is clearly attempting to conflate things, because that's what leftists do, as a matter of course (and no, don't start with me… unions in the United States openly flaunt their left-leaning political ideologies nowadays), but there is a greater societal issue—about which, discussion is actively avoided—that is driving Apple's decision-making in Towson. Everyone wants to dance around it. Nobody wants to be that kid who points out the Emperor is not wearing any clothes. "Whistle past the graveyard", I believe is the olden-times saying.
But doesn't mean that Apple could just not be jerks to their union-organized employees too.
EDIT: And a lot of people not understanding logic here… rather ironic considering 'logic' runs the devices we're here discussing most of the time. Because the contract stipulates a MUST (that Apple must offer a relocation offer IF a new store is opened within a particular distance) does NOT also act as a 'eXclusive OR', such that it overrides "equal treatment". That means that if Apple builds a new store within said distance but does NOT make a relocation offer to non-contractual employees, it MUST make said offer to contracted employees; conversely it ALSO means—"equal treatment"—that IF Apple DOES make a relocation offer to a store BEYOND the stipulated distance to non-contracted employees, Apple MUST ALSO extend that offer to contracted employees. Contracted employees bargained for BETTER treatment than non-contracted employees; that's the way it works. Apple is being obtuse here, and will lose. But it tracks with the way Apple treats its employees. (No one should be under the illusion that $4T Apple is a Good Entity; they are not. This has been extensively documented, not debatable.)