That is not the case.
I once checked in luggage in Munich, Germany. In the (locked Samsonite) luggage I had a scuba diving flashlight. When I reached my destination, the flashlight was missing and there was a note saying that it will wait for me in Munich upon my return.
I was angry as hell at that time, since a lot of dives required use of a flashlight. But I was also angry, that this happened completely without any interaction with me. Someone could have gotten on the PA system and located me to sort this out.
And I also think that this should be possible in the US as well.
1. If the bag was checked in somewhere then it's reasonably safe at the destination airport as well.
2. If there is an issue during check-in, call me and let's solve that issue.
I do not want people to open my luggage when I'm not present. How can then the question "Did someone put something in your luggage?" be answered?