Why does all new pop music sound the same?


Basically because it IS the same - I think anyone with ears already knows that, but there is more to it. 

https://www.youtube.com/watch?v=oVME_l4IwII
chayro
Well , I believe that the standards are set by the likes of  "The Idols" reality TV programs all over the world and everybody think that is the "sound" that will make it onto becoming world famous or at least famous in their own countries. If you have noticed, there are very little distinction between the winners year after year. 
It's crap.....    My kids are 19 and 22.   Their choice in music is pretty bad.   Although my daughter likes some classic rock ...Fleetwood Mac, Tom Petty,  so that's a good sign.... 

My son is into rap,  hip hop.....  I'm no prude , believe me but I blush at some of those lyrics....   

Everything is mixed to sound best on lesser systems in my opinion.
Jkotze.... you are right on the money...it's like a template or formula.   It's not great songwriting
For all you old folks holding on to your walkers, complaining about contemporary music, and wondering why your kids don't like Rush, John Denver and Motorhead, you need to get your head out of the sand, see some new shows and quit talking about your musical aches and pains:

New Pornographers
Beck
LCD Soundsystem
Arcade Fire
Neko Case
Vampire Weekend
St Vincent
Angel Olsen
Glass Animals
Tame Impala
Cage the Elephant
Green Day
Arctic Monkeys
Cold Play
U2
Franz Ferdinand
The Killers
Group Love
The Kooks
Mac DeMarco
MGMT
Modest Mouse
Matt and Kim
The Yeah, Yeah, Yeahs
OK GO
TV on the Radio
Passion Pit
Phoenix
Peter Bjorn and John
The Shins
Spoon
The Strokes
Two Door Cinema Club
Weezer
Jack White
Black Keys
Courtney Barnett
Kurt Vile
The Lumineers
The War on Drugs
My Chemical Romance
Cold War Kids
Foster the People

All new, rock and pop music, as good as any old fogy music and available everywhere.  Ever hear of the internet?