Number of medals is a testament to dominance. Being able to win in all of those events is extremely difficult. The physical and emotional drain a competitor undergoes from having to compete in 8 events against people who are competing in 2-3 events can be overwhelming. Think of the horse racing triple crown. One of the reasons winning it is so difficult is that after the Kentucky Derby, the horse gets 2 weeks rest and has to go again in the Preakness against horses that are well-rested. And then go again in 3 weeks against horses that are again more well-rested. The training it takes to be prepared for 8 events and to win 8 events is incredible.