You never have people unwrapping candies or playing with their program and making this horrible noise or talking to each other when you listen to music through headphones or speakers... Of course, a live concert could be much better, if only I could be the only one in the audience!
I cannot remember any concert where I had someone unwrapping candy or playing with their program. But far worse, I do remember one where I finally had to turn around and tell the woman seated behind me to please stop singing along with the artist on stage. Neither speakers, as good as they get, nor headphones can replicate the experience nor acoustics of a great live performance....apples, oranges, pears. They all have their merits and flaws IMO. If you were the only one in the audience the performance hall (room) you were listening in would sound entirely different than if it were full of other people, just from the standpoint of how the bodies alter the acoustics of the space. You might not like what you hear...depends on the room.