The world of "King of the Bingo Game" is governed by a grossly unfair set of rules that the protagonist eventually attempts to break. We're talking social rules, legal rules, unspoken rules, and even rules as specific as those of a simple bingo game. It's likely that those very bingo rules serve as a proxy for the rules of a white-dominated society; if this is the case, then the story illustrates the tremendous difficulty of attempting to break free of those rules during the time of the story.
According to the larger rules governing the protagonist's society, the night could have had no other outcome.