In simpler times, learning trade skills was all one needed to survive economically. Today that still may be true, depending upon your definition of survival.
Upon the arrival of less simple times, those who anticipated more than basic economic survival chose a broader education than solely learning a trade. Self teaching and or formalized university learning enabled economic options.
Educating at university enabled career seekers to prepare for a lifetime of progress along a path within a studied domain. Some paths branched, others were long singular journeys. The chosen domain enabled a lifetime prosperity.
Simplicity evolved into complexity, both the trade skills and the single-dose university methodologies put many at later stages in their lives discovering their known means for economic survival failing them. The rate at which complexity arrived with respect to education's rate of evolution leapt out of sync.
Those who had not elected ongoing self-teaching in the budding technological domains throughout their traditional careers confronted a fly-or-die type dilemma, economically speaking.
Fortunately you, like us, were on the scene to help older individuals continue to own their economic independence while intellectually preparing younger individuals for accelerating change. Your success became their success. In cooperation, everyone came out ahead.