The cross-bolt safety was added to reduce the deaths associated with folks fumbling the hammer from half-cock.
Leverguns were cheap and easy to pack, so they were given to kids as their first rifle. Old-not-so-bright geezers told them to carry them chamber loaded and hammer at half-cock. Kids would fumble the hammer and BOOM!. So in reaction to the data, data presented in every hunter's safety class, the industry went to the crossbolt safety. It solved the problem of fumbling the hammer and it also made it safer to unload the levergun by cycling the action.
To each his own, but it never hurts to know the facts.