Answer:
I disagree with this statement because I believe that Physical Education (PE) is a very important subject for each individual.
It has been proven that any sort of physical education improves the activity of your brain, if an individual's level of brain activity is higher, it means he learns more from other education and performs better on his tests.
Physical Education is also a practical lesson that relieves stress off students from all the other core subjects that do not that involve as much practical activity.
Physical Education makes you healthier, the healthier you are the better your life style and (technically) life time will be.
Physical Education is also now proven to wake up students, this means students are less lazy and goes back to one of my previous points mentioning a students activity and performance in a lesson or a test. And also the class allows us to combat our growing obesity problem and it provides leisure time for students, something they sorely need. In Finland, schools have 15 minute breaks after every 45 minutes of teaching. This keeps the kids relaxed and happy. Sadness and stress are damaging to their health and their grades.
I hope this helped, any other questions let me know.