[Lee Heggy]

"property isn't worth a human life,"

This is true if there are traps set but if there is an armed guard or home owner with a shotgun does it still apply?

[The Old Hoosier]

99% of the time, an armed guard serves as deterrent, because of what happens 1% of the time. No one has to be shot.

Booby traps are different.

[Teacher317]

"property isn't worth a human life,"
This is true if there are traps set but if there is an armed guard or home owner with a shotgun does it still apply?

Depending on the jurisdiction, yes. The general rule is that property is not worth a human life. You can use deadly force only if the perp is threatening the safety of you or another, but some states, notably Texas, have differing baseline rules. The issue is whether the existence of the bad guy in your home can safely be assumed to be a threat to safety, and not just property. Different states (and courts, and legislatures) have different opinions on the answer, and rule accordingly.