It looks like the stairwell was built large to support the apartments next to it. Without the large number of occupants who would have to be able to safely exit

It looks like the stairwell was built large to support the apartments next to it. Without the large number of occupants who would have to be able to safely exit thru them, maybe they could probably have some small tables/desks in there? More likely tho it's a publicity stunt for the founder networking organization he runs.