Being charitable, it's not actually binary, because sick leave has both a quantity axis and an accessibility access. The "universal" qualifier makes the accessibility axis binary. There's still a big difference between universal 1-day-per-year paid sick leave and universal 30-day-per-year paid sick leave or what have you.

I read it as relating to the quantity of leave. E.g., a country could have "7 days per year of universal guaranteed paid sick leave".

It's not "oddly", it's deliberately deceptive and trying to exaggerate the problem to advance a political narrative.