Six figures is only low income for certain areas (not the whole bay area), and only for households with enough children. For households, two 50k parents is an easy 100k.
I do not believe six figures entry level jobs are common outside the highly trained professional fields, but I don't have data on hand for it.
10 years ago a "six figure salary" included developers at FAANG companies, mid-level managers and late-career roles in more industries, highly-tenured individuals in government roles.
Today, a "six figure salary" qualifies you for low-income housing in the bay area and is paid as entry-level or mid-career salary to an incredibly wide range of jobs.