What is the point!

I am wondering why we have to do these observations for our classes.  We learn about these great strategies and activities to use in the classroom, and then when we go to a school, to observe these strategies/activities, the teachers are not even using them.  At least that is my experience so far.  It has been so frustrating  to watch a teacher lecture and test and call that teaching.  What do I get out of it, and more importantly the students?  I understand I can see what to not do, but there is only so much of that you can take and use.  I can guarantee that when I go on an interview at the end of my program the principal will ask. “How can you incorporate these strategies into your classroom?”  I could respond with, “I don’t know, I have never seen it done before”.  I wouldn’t say that, but it is just frustrating to get excited about observations when the teachers are doing what you are not suposed to be doing.  What is the answer to this problem?  Anyone else experience this?  Does it ever end?