The bolt sleeve lock actually has nothing to do with the military wing safety, or sporting trigger safety.
What it does is positively lock the bolt sleeve & cocked striker from turning and uncocking itself after the bolt is opened.
Were it not for the bolt sleeve lock, a bump or such on the bolt sleeve, or just pushing on the wing safety lever, or the idle hands of a bored solder could rotate it just enough for the cocking piece to slip off the ledge of the cocking cam in the bolt.
Then the bolt sleeve and cocking piece would rotate out of position as the striker spring drove it foreword.
And then the rifle would be out of commission until you took the bolt apart and recocked it, then screwed the bolt sleeve & striker assembly back in the bolt to the proper position to align it again so the bolt would close.
It was a positively necessary feature of any military bolt-action rifle.
Other bolt-action sporting rifles may not have a visible bolt sleeve lock like a Mauser, but they all have some sort of internal system to do the same thing.
It just won't do to have any rifle uncock itself accidentally when the bolt is open.
rc