Earlier quoted context omitted.
If you're able to get a salary of 100k, then you're that top 5% or 10% that I mentioned _might_ be able to do well in a hot market. There are lots of people who aren't so lucky and don't have that opportunity.
$100k isn't a particularly high salary for a software engineer in the US these days. Even in lower COL areas.
Those salaries _can_ be found in other areas of the country, but they are almost completely concentrated to tech hubs of the country. Lots of cities throughout the country don't have these jobs.