This is not necessarily a fallacious argument and I did qualify my argument. The formal education was designed to accommodate the majority of learners by many people who have dedicated much study to how people learn, to dismiss it as just as good as ad hoc training, seems like a vast over generalization to me. I would classify your argument for the proposition as an anecdotal fallacy, based on your personal experience, though to fair you did qualify your assertion. I do disagree with the idea that unstructured learning is just as valid as formalized instruction. We should also be making a distinction between education and job training because these are not the same thing. Vocational training prepares you to do a specific job. Education seeks to train your mind. An instructor challenges your assumptions and expands your mind to consider other points of view or other ways of thinking, that is the essence of education. I happen to believe that such an education can be obtained in a gender studies program.
To dismiss the value of such an experience is a demonstration that people these days are highly uninterested in developing critical thinking and more interested in getting a job and moving on with life, in my view.