My teachers only give brief power points outlining our AP chem textbook. My Physics C teacher just goes over hw problems from a review packet. I only learn how to solve specific problems that wont show up on tests or the AP. I would rather self study and learn concepts where I can apply it to a wide range of problems. Those brief chapter outlines in AP chem are too general and dont cover the topics with enough depth. Biology is just like Chemistry. Last year the teacher only briefly outlined the textbook in her power points. only way to pass was to read straight from the textbook.
Well, you still have to pay attention. You could lose points for not doing so. But it just means you have to self study. People in my school who had one of the APUSH teachers had to.
Well you’re in school for some 7 hours a day, might as well utilize it.
Too bad your teacher is like that. I have a great AP Chem teacher that makes me love that class. Even so, I would recommend you still pay attention because there are times during the teacher’s drones that the teacher could mention something important, and you would have missed it. I know my AP Chem teacher, during the middle of his lecture, would randomly say “Oh, this exact thing is on the test” and then go on with his lecture, and if I had not been paying attention, I would have missed that. 
Most AP classes rely solely on the textbook; it’s mostly about reading and be able to take that concept further (that’s what defines an AP class). The class is mostly just to guide you, reinforce topics, explain a bit further on topics, and hand you things so you make sure you’re on track. They’re not meant to teach you any new-new things that aren’t in the book.
Unless participation is a really big part of your grade, I think it’s safe not to pay attention. I was in pretty much the same situation with my AP Gov class last year, and I pulled an A in the class and a 5 on the exam basically without listening to a single lecture. I used class time to take notes straight from the textbook since that’s what the teacher tested us over, anyway.
I think it’s good to pay attention, sometimes I might gloss over little things. Teachers are still specialized professionals, and they might include some “rule of thumb” tidbits.
I think you should pay attention, since participation is important.
You don’t have to if you are a smart kid. Just read the textbook and just copy the notes from someone else day before the test and you will be fine. Jk just pay attention just for the sake of it.
If you pay attention in class you won’t have to use as much time reading the textbook at home and you’ll get more free time/sleep.