Is Case 4.15.4 Situation C wrong?

[bard]

4-12-3 states that team control continues until: a. a try or tap b. an opponent secures control c. the ball becomes dead None of those things happened here, so why would team control have ended?
Not a pass, not a dribble, not a try, not a violation...I'm getting a headache.

But this is what's bothering me. The backboard seems entirely inconsequential. I recall watching a Purdue game several years ago when Purdue attempted an alley oop. It was an obvious pass attempt--obvious from the manner in which the ball was thrown, the timed jump of the post players, and the reactions of the players afterward. The "pass" got nothing but net.

So again, why do we care about the backboard? If the pass is "so bad" that it goes in, oh well--them's the rules. I better stop before the headache gets worse...