I am with Brat. Yes of course WC we see only what the producers want us to see and only observe one participant for a few minutes rather than weeks at a time. However having been an 'assessor' for many years I have found snap judgements are frequently correct.
I could give examples but I won't. In the TV programme that woman was clearly a cut above all the men. That is the point, not that she should have been recruited or would have passed, but she was way better than average.
While Miss PN1 enjoyed her time in, no way could she yomp with a 10kg pack. Miss PN2 did her back in and could hardly handle her L85A2.