Talking about the general population, sure. But we're talking about software engineers, the most highly paid while at the same time the most accessible profession of all time.
There are high school dropouts making 5 times the national average wage in SWE, and that's not unusual at all - you have the ones making 10 times for the "unusual" category. A person that knows nothing can get a job that pays the national average wage in this industry.
I personally helped 7 people get from 0 to a job within a year. All of them are now (after 1-3 years of experience) making at least 5 times more than they did before they switched careers.