@Walter Hinteler,
I would imagine the huge majority of our lawyers also studied law at universities in advance of the bar examination. Once they pass the bar and are licensed as lawyers, however, I think only a very few ever return to the university for more education. But they certainly continue to research and study and learn and increase their knowledge and skills as attorneys. At least the good ones do. But they do so outside the university system.
And, when they need specific knowledge to prepare for a case, they generally go to a source that can bring them up to speed quickly, efficiently, and competently. I can't imagine many would go to a university for that. For the kind of routine basics I am occasionally paid to teach to lawyers, I can't think of a university that would even have that information.