Similar problem with looting stone tools repeatedly. Stone tool specifically are worthless as loot and break SOD.
Who the hell is crafting these caveman tools and then leaving them around in sealed crates?
Surely the sealed crates are meant to contain supplies from before the bombs fell?
If the stuff in these crates is actually limited by your level or gamestage, then doesn't it mean that there's absolutely no incentive to open them until you hit a decent level because it's a total waste to spend a valuable Working Stuff or Shotgun Messiah crate if your low GS won't allow it to roll anything higher tier than stone?
No. Sealed crates (and supply drops) shouldn't be effected by game stage at all, because they're untouched, unopened supplies from before the bombs fell.
Nothing in them should be hand-made by apocalyptic survivors. It should all be hammers and wrenches and guns.
If you want to make low-tier guns like pistols more common than high tier guns like auto-shotguns, that makes perfect sense.
But why would a shotgun messiah store stock blunderbusses or primitive bows?
Why world a Working Stuff factory stock stone sledgehammers or stone axes?
No. Grade 0 weapons and tools (things clearly built after the end of the world) shouldn't be on the loot-table for these locations at all.