The percentage makes sense. Yes, there are those of us who make over 100k a year, and there are the vast majority of us who do not. Also have to take into consideration, that percentage is based on legal earnings. They do not include the underground economy in it (Drugs, sex, scamming, etc). We who make over 100k are rare.
What we should be taking from this, and I say this especially for our sisters, is that combining your income can push you above the threshold pretty easily. Working together is better than doing it alone (especially with the COL at the moment). So find an upstanding man or woman and build together. You will be better off in the end sharing the load, than you would be trying to go it all alone with a barely middle class wage/salary.
That advice also holds if you are already making 6 figures, because having a spouse can up your reputation in companies, helping your employment and promotion prospects. GMB is something fun to bandy about, but in truth a good spouse is worth their weight in gold.