I think we need to define "Golden Age" is bit more clearly.
Golden Age: A period of time when skill, popularity, and authenticity combined to create the best possible incarnation of something.
This is off the top of my head.
Anyway, a poster made a comparison to Rock music.
I suppose the Golden Age of Rock was the late 1960s when the skill of Jimi Hendrix / The Doors / Led Zeppelin / The Who etc. gained mass popularity while remaining an authentic (less corporatized / commodified / electronic / technological) musical form.
By the 1980s, that combination was virtually dead in Rock music. Record company control / greed, a decline in innovative or artistic playing along with fragmented fan bases who chose tamer lighter music (Duran Duran, The Smiths, & The Cure or Hair Metal, etc.).
Anyway, perhaps the Golden Age of football has ended. Although popularity is as high as ever, skill may have been overtaken by speed, size, and violence. While the authenticity of the players and league seems to have declined to total commercialization and player pampering.
Add the head injury factor and the exponential decline in youth participation, we may have witnessed the best the sport has ever offered.
Again, to bridge this to rock, I do not think the youth navigate toward rock as much as during the Golden Age. Rap / Hip Hop / Electronic / and hybrid music forms appear to have gained the mass popularity and those who try to follow in the classic rock footsteps sound like copies of copies of copies.
I am just speculating on this definition. But perhaps the OP has a point.