Most lawyers who read the GPL are not excited to go to court. They will advise you are settle without going to court. Lawyers generally want to feel like they have a chance at winning a case in court before bothering, it doesn't feel good to lose - even when you know in advance the case is lost.

Don't read that as lawyers never go to court unless they will win. This is obviously not true: there are many reasons to take a case to court knowing you will lose it. However if a case will be lost in court they will avoid court if possible.