Yes, I mean, some people don't have the time or skill to play on harder difficulties and they just play on the easiest mode to experience the story. Did you truly beat the game if you do that? I'm all about play however you want. I sometimes replay games on easy just because I want to relive the story.
I'm in my 20s and I've always said "finished the game", I agree "beat" feels odd with the way gaming has changed nowadays.
Back then pretty much every game took dedication and skill to finish, so "beat" made sense
save