Never put anything in checked luggage that you aren’t willing to loose. I once had an airport loose 5 suitcases when going on a cruise in the Mediterranean. Didn’t see them until 3 ish days later and everything inside was damp as if it had sat out in the rain or on a wet curb and gotten splashed a lot. Ruined some of my brothers books he’d brought. But I had my valuables ( and a spare change of clothes) in my carryon so I was alright.

Luggage gets lost, stolen, broken into and just plain raised all the time. Our bags had locks on them and they still looked like they had been rifled through Thoroughly, each and every single bag.

Sorry you got robbed, I’d consider contacting the police as this isn’t a case of just leaving it on a plane but someone actually breaking into your bag and stealing your personal expensive belongings. That’s a crime and the airports will probably be a Lot more willing to do something about it ( they have cameras literally everywhere in airports) if you mention that you’ve gotten the police involved.