Let me ask some questions. Do you think Solomon was the first person to realize this, did he come up with this de novo? Or, perhaps, he was also a product of his cultural environment. Is it possible that he has been lionized by the hagiography that surrounds him to make it seem as if nobody had ever had such moral insights until he came along? Do you think it is likely or unlikely that cultures which don't have any Abrahamic tradition have also arrived at the same conclusions?
More importantly, whatever contributions Solomon's wisdom has had on our culture, there are thousands of other competing (and often contradicting) ideas in the milieu. Even if Solomon was the author of the wisdom ascribed to him, it isn't obvious to me that those ideas are at the center of our culture or at the forefront of everyone's thoughts, and so it isn't "obvious [that it has] been provided beforehand."
I can pinpoint when I had my own epiphany. Probably like many people on HN, I did quite well in school. I took standardized tests every year starting in grade 1 and a few weeks later I'd receive a breakdown of what percentile I scored in math, vocabulary, reading, etc, and a combined score. I wouldn't say I had an ego about it, but it was planted in my mind that I was smart and would grow up and do great things: maybe I'd invent something amazing, or discover some deep scientific principle.
Early in high school I had the thought: no matter what I do, it is unlikely that I'll ever be as famous as, say, US President John Tyler, and nobody gives a damn about him. In fact, very few people achieve lasting fame, eg Jesus or Buddha or Isaac Newton. Heck, I don't give a moment's thought about my great grandparents. Each of us is just a ripple in a pond, and as the diameter of our ripple gets larger, its amplitude shrinks. Conceptually, the effects last forever, but only in the most diffuse, indirect manner. Thus my goal became not to do something great that would impress everyone, but to focus on making a positive difference to the people nearest me in space and time; everything else that ripples out of that is gravy.
Why tell this story? Because culturally I had been programmed, and I still see it in full force, that fame and influence are desirable goals. Look at how many people try to become influencers on social media, or do the dumbest things on youtube or tiktok to get eyes to look at them. Yet despite that programming, that thought really changed my life philosophy. Just a realization to a sheltered 14 or 15 year old, so I'm sure there are many people who have had similar thoughts.