I mean, the existence of sites like this prove that some do value penis size, but ultimately, it's not worth this kind of focus. Outside of sex, no1 knows my cock size, it doesn't come up, it simply doesn't matter. I don't know the size of the cocks in my family, nor do I care, cuz it's inconsequential.
Let's assume that you are correct and a large penis can get you a job. What happens after? Will a big dick save an unqualified doctor from a malpractice lawsuit? Will a big dick save the job of a shoddy mechanic? When you're on a flight, do you hope that the plane was fueled by someone hung? No! Outside of sex, a big cock doesn't really lend itself in any meaningful way.
In the end, anyone with a big cock simply had the luck of the genetic lottery-that's the extent of it. Big dick or not, unless you're in porn, you've gotta work like everyone else to succeed, and in that process, no1 will give a flying shit about the size of your cock. I've never read a eulogy that begins with "he was a father, he was a brother, he was hung...."