Perhaps it's because our future selves are strangers to us that we generally find it difficult to picture them, to see them earning and having to make repayments on what we buy today. If saving feels like giving money away to someone we don't know, why would taking on debt be any different? 'Someone else' (read: future you) will pay for it.
What we're really doing when we borrow is spending 'future dollars' – money that we'll earn in the years to come. We take yet-to-be cash flow and use it ahead of time.
This may or may not be what's best for us – no judgement here – but it helps to think of it as spending our own future dollars to make sure.
Is it worth it?
Some things will make more sense to borrow for than others. Student borrowing, which is meant to create better options for future income, is an obvious candidate. And since practically none of us walk around with hundreds of thousands in our back pockets for a house, it makes sense to find a home as soon as possible and borrow to live in it. These can be good uses of future dollars now.
Other things not so much. Many of the things that wind up lingering on our credit cards (holidays, groceries, petrol) would be better paid with cash we hold now.
Why overcommit our future selves when there may be much more pressing uses for money down the line?