I understand sport breeders or even just devoted owners want to do ‘what is best’ for their animals. But this trend (I see across SM) of encouraging people to ‘wait’ to geld/castrate is not a good thing for the animal industry. Both large and small pet populations have thousands and thousands of unwanted animals destroyed annually. Perpetuating a narrative of waiting to allow muscle/joint/whatever growth is a bad direction for the industry. Very few of the intact animals are in expert hands. And even when they are, it is NOT always the smartest thing to do to encourage “everyday” owners to attempt to follow high end/expert care regimes.
A good surgeon is good with a scalpel. Does not mean everybody should pick one up and give it a try.