The health insurance is the part that just is hard to relate to much of the world which is where the fear/sadness comes from. It is the undertone in any wealth discussion. So many people in the US see their family and friends get medically bankrupted for one reason or another and insurance being tied to employment makes everything awful.

The fact that you simply can't save enough to get medical care is foundationally depressing.

Health insurance should have little effect on children's happiness (both because the USA provides baseline child healthcare to all, effectively, and because kids don't and shouldn't even know what "health insurance" is).

So perhaps we can cross-reference that to see if health insurance is causal (also 60% of Americans have health insurance and 'losing job' is way more about losing income than insurance).