Leadership and judgment are more like musical or artistic talents acquired skills such as walking or learning to speak.

I don't think just anyone can learn these traits. You have all heard about the musician who studied and worked his but off to learn everything he could then graduated who plays the notes correctly but somehow the music is lacking a certain artistic quality. Another, gifted, with the same background, plays the same piece and turns the music into a true masterpiece. It is not a function of age or experience or training. It is a function of talent.

For example, Ike was promoted Supreme Commander Allied Forces in WWII over others more experienced; he was young, green and made numerous errors while learning. But he had the capacity to get it right. Others, or the vast majority of others anyway, however trained or experienced, could not do so.

It takes courage for a leader to pick someone who is growing over the present and more obvious candidate, but it works, especially if there is a decent support system for the new competitor.

Anybody who gets to be President of the USA, anybody, who gets there has a lot going for them. They all have moves. In that context I thinks it comes down to who's best for the time e.g. President Ford is looking better every day.

There is data that hint to key relevant behaviors and characteristics which I believe underlie judgment are visible and measurable in childhood psychological experiments.
Although born equal we are not all, in the end, equal. We can not all be leaders...or all the time.