Nobody is out there asking for the human element when they’re out there timing Olympic sprinters.
“ooh, lane 6 has Jenkins, notorious for his slow stopwatch. Tough draw that one. Timing lane three is McNurtle, who always times off the shoulders not the chest - the runner’ll be wise to use his lean to proper advantage!”
could you imagine how outrageous that would be? The umpires are there to get the calls correct - to accurately adjudicate the outcome of the play, not to offer their subjective interpretation of the rules.