You could use obscurity, such that:
Well, this obscurity was in fact the very reason why I decided to call this meeting tonight.
Which is defined and exemplified over on The Free Dictionary as:
The quality or condition of being imperfectly known or difficult to understand: "writings meant to be understood . . . by all, composed without deliberate obscurity or hidden motives" (National Review).
Or, ambiguity, from the same source as above:
Doubtfulness or uncertainty as regards interpretation: "leading a life of alleged moral ambiguity" (Anatole Broyard).
Or, you could use palpable, I guess:
Easily perceived; obvious
So that the sentence becomes:
Well, this lack of palpability was in fact the very reason why I decided to call this meeting tonight.
But this does alter the sentence more than you desire, just an option.