Earlier quoted context omitted.
You forgot to factor in that he's also paying indirectly for employer-provided health insurance. How much is that in comparison?
Same goes for Europe, my national insurance contribution(which doesn't even technically cover healthcare) is £6,664 a year, my employer pays an additional £17,281.19 in NICS a year. Do you think that you and your employer pay more than $30K a year for healthcare? Don't get me wrong there are a lot of things wrong with US healthcare including the costs for uninsured but Europeans pay through the nose direct and indire…
If I add the costs for my grandmother, then that sounds very likely.
The important thing about universal healthcare is that workers pay for those who cannot pay themselves, so it's to be expected that a 30yo developer would pay way more than he gets back out. It's only fair, I'm gonna be old someday and I definitely want my health insurance to cover my expenses when I cannot pay premiums anymore.