Well this is sport ,not public policy. People are most invested in outliers anyway. And two, I'm not doing the research and work to track something like 70 years worth of 3 times medalists and their ages (even if it was very relevant). Too much effort for no real reward. I don't think 3 world medals signal dominance and longevity anyway, so I disagree with the premise.
Speaking of oldest olympic champs, you know who the oldest olympic wrestling champ was before Lopez, Anatoly Roshcilin (at least I think he was unless you can find some older example ). A super heavyweight (what are the odds) who won at 40.
You can win a lot of medals through a very long career, without being dominant. Kind of like Bruce Buamgertner.
Medved had only two international losses (and two domestic losses to a legend once his career really got going) and went undefeated for his last 7 years. Considering Medved probably only started wrestling when he was drafted to the army at 18 years old, it's not surprising it took him that long for his first medals. It's not like slavs had some ancient traditional link to wresting, Medved wouldn't have encountered wrestling in the 40s/50s in his ancestral village. Yordanov by comparison had about 8 international losses by my count (just judging by his medals, though draws were a thing and we don't have scores).
Saitiev is not an upper weight. Nor is Faedzaev, or Belgalzov.