I understand your concern but android can't be selective for just you, that's why there are 3rd party options out there. I really hate the lock screen approach on iOS 7 because a, you can't dismiss any notifications until you actually unlock the screen and steer towards the notification shade, and b, all your notifications are there for anybody to see when your device is supposed to be locked. This approach is what defeats the purpose of having any sort of security measures on your phone. I think because people are so used to it, they've come to accept this as some sort of standard. All the while it seems so illogical.
Good example, my chase banking app sends me balance notifications that show up on the lock screen, so somebody could get a glance view of my account without even having to unlock my phone. That's crazy. If I turn off show on lock screen, them I have no notification until I unlock my phone and attend to the badge number or dive into the notification shade. That could be hours if I don't even know I have a notification at all. At least with android, I have a blinking light to catch my attention and when I look at the screen it notifies me with an icon on what I need to attend to.