Why do we need to sync iPad or iPhone or iPod?

I don't get it I mean I have never synced my iPad I get all my files on my comp with the help of iCloud, why the hell do these stupid droid fans say that no syncing required for android rubbish, I think they are the ones who should be syncing because they haven't even got any clouds

Its is to create a backup of your apps on your computer, incase you loose them or your iphone breaks etc.

We have a cloud. GOOGLE DRIVE AND DROPBOX.