I mean, he's making a real point about why employment related health care is pretty silly. Kicking people off health plans at the same time they lose income is a very suboptimal result for a society, especially at a time when there is simply not enough demand for labor to possibly reach full employment in jobs that offer decent health insurance.
If you were to design a health system from scratch, there's really no way you'd tie health care to employment in the way the US does for reasons like this plus the imposition it puts on companies to have to manage these plans. The dead weight loss for administering these programs on a company by company level is rough. It also unnecessarily ties people to jobs, lowering entrepreneurial opportunities. It's also an advantage for big businesses over small ones, given they can spread the cost of understanding and managing their plan over a larger population, plus they can better withstand variances in the cost of such benefits. Etc.
It's one thing to say the US shouldn't be single payer; it's another to pretend employer managed health plans are a good idea.
