It's also not the usual argument you hear from UBI proponents (we can reduce costs because we only need UBI).
I don't say this to be a dick, but political change has to happen within political realities.
The article in question is about Finland, where healthcare is already universal, largely free, and much liked by the populace.
UBI wants to change nothing abut the socio-economic structure that drives millions into extreme poverty. It just wants to slightly reduce the rising flood of people that are just run so far down into the ground by the system that they are abandoning society altogether and threaten collapsing it.
Make sure all your people have decent healthcare, housing and food. It is obvious that in some (rich) countries these basic levels of social security are failing hard.
UBI just wants the current rent-seeking financialization machine to keep churning even when its forced in the extreme to trow the bottom of the pyramid some breadcrumbs to prevent them from bailing out.