FGS, for the hard of thinking: some people need a reliable car, it is vital to them to earn their living. And thus, for them, just any ol' car will not do. So they enter PCPs (in some cases, they even use company car allowance or business expense this). This is not 'credit', it is a long-term hire of a vehicle and, like anything you lease, there are terms and conditions of the hire.
Still others enter PCPs because they do not want to be bothered with purchasing a car (negotiating, checking it out, etc), complicated repairs, MOT failures, or selling a car later on. They would rather pay to avoid what they perceive as hassles of car ownership. Again, this is not 'credit', this is entering a lease, as you would do to lease anything.
It has FA to do with appearances, and everything to do with what they see as value for money (time being money for some) and avoidance of what they see as hassle.
If this is too hard for some to process, I wish them well, too.