If you want anime to flawlessly replicate real life, then go watch movies or TV dramas. "The voices don't sound natural"; you'll notice the same about American cartoons. In fact, if you listen closely to the dialogue in a lot of movies you'll notice it's quite stilted and doesn't really sound much like how real people speak, even movies with good actors.

To paraphrase what >>9 said, you're dumb as shit if your main complaint about anime is that it isn't more like real life. Especially moeblob anime. It's pure wish fulfilment, you're supposed to watch it and NOT think about the real world.