If Johnson really thinks it is easy to enter that many events and win them then he should have run in the 100, 200, 400, 1600, and all four relays and got his 8 golds in one games. And he also could have ran one or two backwards.
Total nonsense Jokul. To win 8 medals in one Olympics, a runner would have to win the 100, 200, 400, 800, 1500, 3000, 5000 and 10000 metres, or 7 of those an a marathon, or 6 of those and the two 2 relays.
For a swimmer to win 8 medals, there are much more events. 50, 100, 200, 400, 800 metres may only be 5 distances, but there is breaststroke, backstroke, butterfly and freestyle. There is even the 200 and 400 metre medley races. So those 5 distances alone make up 20 seperate events, and so 20 chances to win gold. Add the medleys, that is 22. That doesn't even take into account the relays.
Johnson's point is legitimate because regardless of the manner in which a person runs, he can only win a single 200 metres gold medal. However, Michael Phelps has won 3 golds over that distance (freestyle, butterfly, free). It is simply not possible for runners to win as many medals as swimmers, because there just aren't enough events.
That is why others should be considered for Greatest Olympian. Steve Redgrave should be up there, because of his longevity. To win 5 gold medals in consecutive Olympics is a great acheivement. Carl Lewis won 7 golds, but in different disciplines. Jessie Owens had 4, also in seperate disciplines. Helice's nomination, "Babe" Didrickson, could be considered, because of her the number of events she excelled in. Daley Thompson, or perhaps some other decathlete, again because it requires all-round dominance?
It is a tough award to give out, simply because there are so many ways of defining the greatest, and the number of golds certainly isn't the only way, nor the best.