> why was it impossible for me to add an aircraft maintenance certification through my school?Because schools can't bullshit maintenance certification curricula and aren't willing to pay qualified faculty.
See also: the alarming number of schools where CS and Data Science courses are still taught by mathematics faulty (because they can't find CS faculty who are willing to work for $70K).
This model of "pay unqualified people to teach a good enough version of the course and hope our consumers don't notice they're being shafted" only works in unregulated fields. Most trades are not unregulated.
