Athletes and sports(wo)men in general are not renowned for their intelligence. I give you Shoala Ameobi ...
http://www.mirrorfootball.co.uk/news/Footballer-Shola-Ameobi-thought-messy-mansion-was-result-of-burglary-article42695.html
This is very different to Rio dashing off from training having been told the testers wanted to see him.
Look into the circumstances of what athletes are expected to do, and especially the circumstances of the 3rd miss, and you may view it very differently.