A lot of t he issues y'all raise can be fixed/prevented with some PM and QC.
I only wear Rollie and Tudor so I probably don't have a lot of the wierd screw issues that some do but the solutions/safeguards are the same. Bracelet screws are always trying to escape, it seems, so on daily wear watches I remove and apply a dab of Loc-Tite "blue" to every screw. After doing this I've never lost a bracelet screw. I think this procedure could also be applied to some of the other "strange" watches that have bezel screws, screw-down backs, etc. Just remove the screw with a well fitting screwdriver, apply a touch of thread-locker, then screw it back in.