How could mortgage not be considered debt? You're taking someone else's money, spending it for your own benefit, and contracting to pay it back on a certain sch

How could mortgage not be considered debt? You're taking someone else's money, spending it for your own benefit, and contracting to pay it back on a certain schedule + a hefty profit for the lender. Sure seems like classic debt to me. Just because there's a lot of structure around it and it's very common doesn't reduce the fact it is actual debt.