What you're saying is definitely not a fact. Mall kiosks are a thing (and the US has them too, sorry to bust that narrative.* But that's not the same thing as it being 'a common model in much of the world.' They're useful in areas that can't support a full library. In cities, they're mostly pointless, because the population is dense enough to have an actual library. They'd be an extra here, not a replacement for a full service library.

I'll ask you again: do you use libraries? Because picking up requests is not even in the top five things people visit my library for.