Something as yet unspoken in this thread is the importance of attitude. Try not to react immediately with negativity to things that are presented to you. One thing you will need to learn in law school is to appreciate various perspectives on issues. It seems the OP may have made a snap judgment without considering that it might possibly be very useful and helpful to read the materials before orientation. Just as a lecture makes more sense and can go into more sophisticated analysis when everyone in class has read the background materials, so too will orientation be more helpful and productive if everyone has done some preparatory work.
Yes, it is all about the exams, but first semester is largely about skill-building, and it's very hard to build skills in law without substantive background. Maybe you're lucky your law school is giving you a head start in this regard. Take advantage of it. (I suspect many students won't do the reading, and if you put some effort into it, you may benefit greatly.) Also, that common set of readings may give you something to talk about with the group of strangers that you meet in orientation -- something that goes beyond "where are you from?" and "what did you do before coming to law school?" and "where do you live?". Your classmates' reactions to the readings can also give you some good clues as to whose personalities are most compatible with yours, or who are the slackers and who are the serious students.
Law school will be a lot more palatable if you give the material the benefit of the doubt. Cases are interesting, law is interesting, even your professors are interesting. Even if that's not true 100% of the time, approaching things with that attitude will help you make the most of your experience.