Forgive my slow response! I think it just comes down to background noise. For example, people every day listen to Radio when driving, or have the news on in the background.

I don't think I could study something difficult with Audio Books or any noise, but for example, tinkering or life's chores like washing clothes, emptying dishwashers, hoovering, showering.... These tasks which must be done anyway can become secondary to an audio book which takes the prime brain space to the point that those tasks become "enjoyable". Especially if you find a good book!