First of all... Cejudo is rumored to be seeking a fight at 145.
Next, I would suggest not just looking at the "average age" of 57 and 61 kg guys. I would suggest looking at dominance over an extended period... which is where I started this conversation. How many guys at 57 and 61 have medalled consistently over 2+ quads? Not a lot. But you see it quite a bit with big guys. Saduleev, Snyder, Taylor, Geno, Taha, Baumgartner, Medved, Karelin, etc, etc, etc. Which of the light guys consistently put it all together for multiple quads? Jordanov? Not Heiguchi... serious issues in 2021 for instance. Mirrors other combat sports with guys like Jones, Fury, Couture, etc.in UFC.