I don’t think your conclusion is correct and a correlation between the two numbers is by far not enough to assume a causality between the two of them. I would rather assume there are a lot of other factors being involved. Like e.g. the education system, especially the amount of years spent on education before starting to work, the general wealth of the society, the social securities provided the government, like e.g. health care, unemployment support etc.
And also because it’s a comfortable cover up for any kind of money saving stupidity. We don’t need proper requirements engineering, we’re agile. We don’t need an operations team we’re doing an agile DevOps approach. We don’t need frontend Devs, we’re an agile team you all need to be full stack. I have often seen agility as an excuse to push more works towards the devs who aren’t trained to do any of those tasks.
Also common problem is that still tons of people believe agile means unplanned. This definitely also contributes to projects failing that are just agile by name.