Would people bother with reading if it wsn't entertaining?

Reading =/= music

You're correct. Music is much older than reading and has purposes nearly as varied. Boiling it down to just entertainment does a disservice to music and fails to understand its development or power.

I bring up this example at least once a year, but this is the perfect opportunity to do so again. There is a tribe in Papau New Guinea called Kaluli, and to make their traditional music you have to kill a bird and use its bones and feathers in the construction of a hand drum. They believe that birds hold the spirits of their dead ancestors. Everyone gets together and plays the bird drums really chaotically, and at the height of the chaos, everyone bursts into tears because they think they are communicating with their ancestors at that time, and not in a metaphorical connection based on tradition and memory, they are literally having a conversation with their dead parents, grandparents, and great grandparents. So that's a good example of how a person can get a meaningful experience with music without using it for entertainment. It's fun to think that we're all connected and that everyone on earth has similar experiences, but I can't play a drum to communicate with my grandparents.

Talking to dead ancestors is entertaining for the whole family!

also see:
-national anthems
-ice cream truck music
-wake up call/alarm clock
-music as torture (as AC/DC was used in Guantanamo Bay)
-non western rituals in general

Also see:
-Joe Satriani
-Steve Vai
-Yngwie Fucking Malmsteen

okay monga's got me here

Seeing the Italian national team sing Il Canto degli Italiani is pretty epic.

Also, this scene from Casablanca, when the French actors and actresses are crying (not acting) singing La Marseillaise is probably more epic.

New Zealand's national anthem is decent enough.

I repeat myself:

OH god the singing !! is that how hetfield sings ? sad......

Yeah his voice seems kind of shot now.