Check out this impressive gate in a San-Francisco house:
One should feel quite safe behind such a gate, worthy of guarding Fort Knox entrance… But wait, what about the windows? I think it would be a fair assumption that if someone wants to forcibly enter your residence, they wouldn’t be above breaking the social norm of using the door. They’d just smash the window and use that convenient step about 2ft high to climb into.
Compare to this:
An entrance gate and barred windows, even on the 2nd floor. That’s a place to live through a riot!