I mean, some countries are worse than others. I have yet to come home from Mexico without my locks being cut off and bag pillaged, but other international flights have been fine.
Other who place GPS trackers on their luggage have watched it leave the airport and go to a random persons house.
Theft of checked in bags is common, and rummaging through bags is expected.
It’s true: never attribute to malice that which can be sufficiently explained by incompetence. Except that we have proof of malice in many cases now that gps trackers have been commoditized.
If you don’t lock your bags, as many don’t, you might attribute a missing item to forgetfulness, but it’s just as likely that it’s simply been stolen.
The simple fact is that you should take care with what you check in, especially in countries of higher corruption, less security or less caring security.
In the states where you baggage likely has cameras on it from beginning to end is different, and probably just incompetence. It’s not like we send our best to manage bags (albeit I’m sure you can come up with some fine examples otherwise).
My bag was delayed by a day one time in 2018 when Thai Airways hustled me to a connection through BKK, but my luggage wasn’t so lucky. That’s the only time I’ve had a problem. (knock wood)
Of course, my evidence is anecdotal. But so is that of folks who are outraged (outraged!) by their lost luggage.
I reserve my outrage for the people who prolong the boarding process finding bin space for their duffel bag, roller bag, and backpack.
This is exactly the name of the game if you travel to Argentina. Avoid getting separated from your luggage at all times if possible. So basically use a carry-on luggage.
Baggage handling is corrupt as hell in Argentina.
(Ie. only travel with things small enough for cabin or things insured and possible buy again)
If an airline's low-reliability baggage system loses my second-hand bought modular synth I might just have no receipts to show unlike in cases with toiletries and medication for example for one, and besides sometimes it can just be something I cannot even buy again.