“I am the only one who can see it, but trust me, it’s there.“
...and not to count time. It is used in tennis, for example, to determine of a ball is in or out--that's a positional issue that a high-frame-rate system like Hawkeye was designed to work on.
Hawkeye was not designed, I believe, to be a digital; timer the way the game clock is, where time is simply counted down sequentially. I read somewhere earlier that Hawkeye gets synced to the game clock and then interim timings of less than a second are based on frame rate algorithms. There is almost certainly a margin of error to this; Hawkeye admits to a 5% error margin (3.6mm versus the diameter of a tennis ball at 67mm) for in and out calls. Who knows what sort of error could creep into the attempt to use Hawkeye as a timer, rather than as a positional analyst.
The rule book says that the game clock keeps time, and tenths of a second aren't to be counted. So how did they manage to use an app designed to determine position to supercede the evidence of the game clock?
The sports books needed to see what the would make the most money on.