I can hear it now. Teachers all over the world shushing people. We have to save the children! They need silence to be able to think! Be quiet! Give me a break.
I am a fan of reality. A lot of educators seem to prefer to live in fairy tale land sometimes. The reality is that outside of school, many situations that require learning or focus will be noisy.
How many jobs involve working in a big room with phones and conversations going on everywhere? How many times in college will other students be playing loud music when you want to study?
Kids will be better off if they get some practice having to concentrate with a little chaos going on around them every now and then. They need to learn to get over it.
I'm not saying that teachers should let noise be rampant every minute of every school day. We just don't need to be so uptight on trying to make it so quiet all the time that you could hear a pin could drop whenever work is being done.
So, save the children. Prepare them for life. Just don't baby them. That stops for most people once they get away from their parents and school. Get used to it.