A study that tests the effects on music on a task involving listening or speaking is not obviously relevant to tasks that do not involve your auditory pathways.
Also, [always distracting to the majority] does not equal [always distracting to everyone].
There is limited evidence that listening to music can help some people with ADHD maintain focus (something that I have personally found to be the case in non-academic situations). Reference.
My personal experience is that on task in which I am distractible because I am bored or under-engaged, music helps keep my 'squirrel!' circuit from firing.
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