A recall gun on a sprint start stops more than the eight athletes in the blocks. It interrupts an entire stadium that has been silenced and focused on one moment.
The silence has to be rebuilt
Getting a full stadium quiet for a start takes time and cooperation. A false start spends that quiet and requires the whole process to begin again.
Crowds are less compliant the second time, particularly if the recall was ambiguous from the stands. Noise creeps back into the set position.
Announcers therefore intervene explicitly after a recall, explaining what happened and asking for quiet again in a way they did not need to the first time.
The athletes are the greater cost
A sprinter in the set position is holding a highly loaded, unstable posture. Standing down from it and returning is physically expensive.
The psychological cost is larger. Reaction timing depends on a rhythm the starter establishes, and a recall destroys it for everyone in the race.
Athletes not responsible for the recall bear that cost equally, which is why disqualification rules are strict rather than lenient.
Adjudication takes real time
Reaction time data has to be reviewed to identify who moved early, and the athlete must be informed and, where permitted, given a route to appeal.
That process happens on the track in front of a full stadium, which is uncomfortable for everyone and unavoidable given the alternatives.
Meets try to keep it short by having the decision routed through a single official rather than debated among several.
Concurrent events feel it too
Field events were already paused for the start. A recall extends that pause unpredictably, and athletes mid-competition wait longer than anyone planned.
Officials in the infield hold their competitions rather than restarting them, because the race will be run within minutes.
A sequence of recalls can push a field competition's rhythm badly out of shape, and coaches raise it with meet officials afterwards.
Why the current rule holds
Stricter false start rules were adopted precisely because the disruption is collective rather than individual. Tolerating early movement penalizes the field.
The severity is regularly criticized when a leading athlete is removed, and the counterargument is always the same: someone loses either way.
What the rule has produced is fewer recalls per session, which is measurable in how often a stadium has to be resettled during an evening.

