The point of middle school is to get the pre-teens ready for high school. Middle school does not need recess, seeing as how they are forced at middle school to take a physical education class. In your first argument you stated that "they need a break from the stress filled day". Their break comes after school gets out.
i see your point but they need a break during the eight hour school day. also physical education does not let them choose what to do, they need freedom and more time to socialize other than a 15 min lunch