I've had a bit of everything. The most valuable lesson I got from my formal education was how to learn things for myself. Apart from that, it was good to meet the people. Otherwise I found the whole idea of formal education, and the experience of it, rather unpleasant.
I've also attended, and continue to attend, many workshops and courses, either for technical reasons (introduction of new film, new camera, new techniques etc) or to meet a person whose work I admire. I have always been willing to assist other photographers and I've worked for a few, in the field, in the studio and in their darkrooms.
One of the dangers of a formal education or qualification (in my opinion) is that one may be inclined to place too much importance on it once one has it. You've got to keep moving on, and accept that it was only a beginning.
The reasonably solid technical understanding I gained from all this learning stuff has probably helped me to get some interesting jobs.
Best,
Helen