Sensationalized the legal professrion
The work of a lawyer doesn't include those intense witness questionings in front of an audience, those one-on-one conferences with the judge, and those Sherlock Holmes' investigations for evidence. If you go to real court, you don't often see lawyers with pretty briefcases and fancy suits (as Richard Gere had); you typically see lawyers wearing school-boy backpacks and (at best) merely formal attire (shirt, dress-pants, and dress-shoes).
I know, of course, that "Primal Fear" is not the only movie to sensationalize / glamorize the legal profession, but it is one. Movies like these have created the oversupply of lawyers, as everyone tries to become like Richard Gere's character.