One can be largely satisfied with their situation but still be lonely or just not particularly happy & fulfilled. Higher satisfaction with one's income can mean more loneliness because of work hours etc.
The number of births per woman has been declining for decades worldwide, in cases like South Korea it's collapsing massively. That has many reasons, but it's obviously linked to loneliness and relationships.
> This is a manufactured crisis like seed oils, or ADHD and autism diagnoses
More ADHD and autism diagnoses aren't a crisis, they're an improvement in detection and diagnosis and overall life quality of the affected people.
There's improved diagnosis but much of it is test fraud because students with accommodations score higher than the general population on most competitive tests like the LSATs. It's also why diagnoses are higher in states with more accommodations.