For what it's worth, in places where there is no room safe...
I put my Maria jewelry box that has the pieces I am not wearing inside my luggage. I then zip up the luggage and put the lock on.
Luggage looks normal, like no big deal. Your luggage then becomes the "safe".
Housekeeping is not going to walk away with a big suitcase, and I doubt they would dare to proactively be so aggressive as to clip the lock.
I travel a lot and have done this for years. Works like a charm.
Related to jewelry loss...
For me, I am not so much concerned about jewelry theft (low odds in reailty).
I am more concerned about damaging my jewelry when wearing it (much higher odds).
This includes banging a ring hard against a concrete wall or dropping a watch on the marble floor of the hotel room bathroom... true examples. I have also accidentally thrown away diamond earrings wrapped in tissue (this was my pre-Maria cube era).
For this reason, I am a big time believer in insuring my higher end pieces of jewelry.
Insurance gives me 100% piece of mind, and I wear all my pieces anywhere, anytime I want. Insurance premiums do add up, but it's worth it to me. I never worry when I wear my pieces.
Just a thought I want to share. There is much higher odds of damaging your jewelry than theft.