A timing chain will supposedly last for the lifetime of the car in an average passenger car, but a timing belt will need to be changed at least 3 times, if not more during the lifespan of such a car. Why would timing belts be used in any car, ever, given how time-consuming/costly the procedure of changing one is?
The only reasonable justification I've managed to find researching online is that a timing belt "is quieter", but I have a 2005 Ford Mondeo with a timing chain myself and I cannot say it is noticeably louder in any way compared to other cars I have previously had that had timing belts instead. I also did read something about timing belts requiring more oil, but so what? Surely the cost of the oil for the lifetime of the would only be a fraction of the cost of paying for changing the timing belt 3+ times?
What I am looking for here mostly is not mechanical explanations as to how timing chains are more complicated and when things go wrong with them they will go more wrong than with belts. From the perspective of the average car owner, why would anyone ever want to buy a car with a timing belt? Based on all the information I have the average belt/chain-related maintenance cost of a car over its lifetime will be lower for one with a chain than for one with a belt.
So to summarize : Why are cars with timing belts still produced and who would want to buy them, from a maintenance cost perspective only?