From a collectivist view, adding a time penalty that corresponds to which half the runner was in looks good.
From an individualist view, they note some runners who didn’t receive extra weight still got a debilitating amount of weight from the first distribution. They note that some of the extra-weight runners are actually positioned well at the front. Accordingly, their mind reels at the idea of a time penalty applied based on which half the runner was in. “How is it first group runner’s fault that someone else added weight to the second group?” they wonder.
I do understand the individualist objections, but I also don’t accept that doing nothing is the most fair approach.
Some people from group A enjoy running and can run fast, therefore join marathons and are good at it.
Some people from group B enjoy playing table tennis and have great reflexes, therefore join table tennis tournaments and are good at it.
Some other people realise that marathons have way more A people than B people, and since marathons are prestigious they force equal ratio of A/B people in marathons, effectively reducing the overall quality of marathons and keeping A people (who would thrive) out of them.
Everyone is unhappy, except the ones who forced the outcome and the ones who got into the prestigious sport without deserving it.
I can’t count how many Ivy League classmates I knew who thought simply being admitted was the end game that proved they were superior. Cheating was rampant. 5.0 weighted GPA perfect SAT Eagle Scouts dropped out.
People angry at the morality of an imperfect collectivist fix in favor of an imperfect collectivist filter are on grounds of curious firmness.
The problem is that there's so many variables in this equation that it can't simply be resolved in a simple "racism bad" or "discrimination bad" and "if they really wanted to they could but in reality they don't want to". It's a bit more complicated than that.