[Markitect]

To be accurate, Univeristy Club Tower doesn't have an entierly blank wall facing Kilbourn Tower. Each unit will have some windows facing north, toward KT, but a majority of the wall is blank.

As far as the UCT developers "wanting" their tower so close to KT--they don't necessarily "want" it to be that close, that's just the way the building is configured. It is a very narrow site, so there's not much room to keep UCT (as it's designed) by widening the space between the two towers.

The space could be widened if UCT was narrower, but that would require redesigning the entire building (for at least the third or fourth time). That option is bad for developers, because it means they have already have a good portion of the current design reserved with prospective buyers. A redesign means they lose out on money and time they've already put into the project, plus they have to spend more to start from scratch. Of course, building a narrower building may mean UCT will have to lose some units, which means the developers would lose out on all the money those dropped units would give them, and the building may end up being uneconomical for them to even construct anymore.

The solution isn't always as easy as "move your building to the back of the site," or "trim a little off the sides so there's more space between the two buildings."