How does it not make sense? 0.o
When you play an hourglass, you get 2 draws per turn.
With 2 draws per turn, you will draw about twice as many pillars as you would have if you only had the one draw, at least in the beginning of the game when it's more important. You will also draw your novas twice as fast.
If you have twice as many pillars as someone else, and draw other means of gaining quanta twice as fast, you will gain about twice as much quanta.
Also, it won't be a waste of deck space, because having double draw effectively halves the size of your deck.
I don't see what the problem with putting in an hourglass or 2 would be. It would get you everything you need much quicker.
And also, it's not wasted quanta if it's doing something. Wasted quanta is having tons of quanta in your pool and not doing anything with it.