I dont care if the person field strips it in front of me, the first thing im doing after they hand it to me is clearing it myself.

This kind of attitude is the exact right way to do it when safety is involved. You make it automatic, not a decision. It's like wearing your seatbelt. It saves you time and energy while producing the best results.

Put another way: Crazy shit happens every day. You make it automatic not because you distrust the person unloading it in front of you. You do it because you shouldn't trust yourself to be perfectly flawless in life and death situations. You do it 100% of the times that you rationally know for certain that it's empty, so that you skip the check 0.00000% of the time that some crazy sequence of events quietly creates a dangerous situation.