Making sense of generational arguments about skill development

I don’t understand the following argument:

“Players from previous generations had more skill.”

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“Players from previous generations were three-sport athletes.”

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“Players from previous generations played more pickup games.”

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“Players need to specialize earlier and train privately with individual coaches to improve their skills.” […]

Luck and landing a college coaching job

Seventeen years after I first was hired as an assistant college basketball coach, I was hired as a part-time head coach at the junior college level. I would like to think that I have earned the opportunity with my work and persistence, but the actual process of landing the job was good fortune and luck. Because many people ask how to get such and such job, here is my story (following my story of how I was hired to coach in Europe). […]