They couldn't wrap the balconies completely around the tower or they would have encroached the hospital's emergency helicopter path. If they had wanted to wrap balconies all around the trade-off would have been a smaller floorplate for units, which in this case they obviously chose not to do.What’s airspace have to do with the look of a building? Lol
Edit: Highlighted the boundary here. They're literally abutting it. I suppose they could have had balconies wrap 1/2 of the way around but IMO this was the better treatment (and there were likely a plethora of other reasons that we aren't privy to).