This is because the theoretical possibility of control of noise by other means in practice simply does not guarantee a peaceful night's sleep or the ability to put children to bed.
Simple answer is that if existing planning and noise pollution controls cannot currently guarantee a peaceful night's sleep from noise pollution emanating from all sources, then it is this legislation which needs improvement until it effectivly does guarantee a peaceful night's sleep.
No one should suffer from noise pollution. But equally any live music which does not in practice cause any noise pollution - should no longer be prevented or limited by the use of any additional entertainment licensing controls, in advance of note being sounded, based only on the assumption that it might present some form of noise pollution.
Our local non-amplified traditional tune session can only currently be enabled as Regulated Entertainment with conditions inposed which insist on a noise limiter being fitted and other time restrictions based on the assumption of it creating possible noise pollution, which the activity could not in fact create.
The idea that there are no proactive measures available to deal with noise pollution, outside of additional entertainment licensing is a myth.