Golden age fallacy?
Off the top of my head, here are few people who fit that description in various ways and who seem to be doing quite well, despite today's "softer world":
Donald Trump, Kanye West, Peter Thiel
Also, softer world? He faced constant death threats. Also: "Almost as quickly as Ali had arrived, his World Boxing Association heavyweight title was gone, revoked after he claimed conscientious objector status in refusing the draft. He also was stripped of his passport and all of his boxing licenses. He faced a five-year prison term after losing an initial court battle defending his objection to serving in a war that he called "despicable and unjust." Ali lost the chance at tens of millions of dollars in endorsements while appealing his case to the U.S. Supreme Court."
Also, this idea of a "soft world" is contradictory. Your claim seems to be that back in the day, because things were less "soft", Ali was allowed to be more self expressive. Yet, it's precisely this "soft world" which promotes the kind of diversity which, for example, would make Ali's conversion to Islam far less of a controversial issue today.
I take offense to the idea of the "golden age fallacy".
Let's constrain fallacies to actual logical mistakes.
Some things actually have had a golden age -- e.g. for bebop it can be fairly accurately be told to be certain decades, and it's not wrong to point to that to say that things are not the same anymore.
(And even if individual outliers might produce an X equivalent to a "golden era of X" artifact, statistically it would still be true to say that now it's not like the golden era of X, if less such works are produced in total and even less consumed and appreciated -- e.g. if I make a great "Miami Bass" tune, it wont mean that the late eights weren't the "golden age" of Miami Bass).
In fact the golden age is so much not a fallacy, that is a valid historical construct (e.g. for Roman democracy the golden age was so and so centuries -- no ifs and buts about it).
That doesn't mean it's false.
> Roman democracy the golden age was so and so centuries -- no ifs and buts about it
Historiography is always changing.
I don't think it's debatable at all. Just look at Mayweather or Conor McGregor. Both spend most of their time telling everyone how great they are and people are fine with that, as long as, like Ali, they back it up with results.
If you believe throwing someone in Jail at the prime of his career, on top of other atrocities he fought through his career while he had to stand up for himself is "society valuing individual struggle and determination", then I believe you need to sit down and open a dictionary. This is some amazing revisionist history.
So like Kanye West?