You're confusing a direct answer with a rude one. Wjosten's reply wasn't rude. It was accurate and direct, without any sugercoating. You can't get the device to operate the way that you want (lock the screen, but not really 'lock' the screen). It's not a 'screensaver' like on your computer. It's a lock screen, designed to prevent accidental activation of the device screen, and possibly launching apps, making phone calls, etcetera.
If you want an option added that allows the device to do what you want, tell Apple.
www.apple.com/feedback
This is a technical assistance forum, not an 'emotional assistance' forum. Wjosten was not rude or insulting in any way. You were.
This is where we tell you how to solve your technical issues. There are no shoulders to cry upon here.
Direct, accurate information. That's what wjosten provided.