At least for the home example, you're usually better off reducing the factors that would make a break-in happen in the first place rather than trying to win an arms race against a determined attacker; there are high trust societies where people don't bother locking their doors and people don't get burgled. But obviously the threat model is different than a utility.
You mean men with guns stationed 24/7? There is no "actual security" against determined burglars available on the market for regular people. There's delaying action (e.g. laminated glass), noise making and deterrence (cameras). Each can be worked around.
This is also a general point on security: there's no perfect security, there's only adequate security - where "adequate" means it costs the attacker more to breach it than they can expect to profit. From this view, appearance of security is almost as good as actual security measures - you make security look expensive to breach, which achieves the same effect, as long as nobody is willing to call your bluff.
What happens when everyone in my street buys the same security system? Seems like we all just spent a lot of money buying something that now offers us no benefit.
Short of purchasing a honeypot property with (seemingly) no security system and going full Home Alone on the inside of it, it seems like you're going to need actual security at some point.