Holding the trigger back and pulling the cock to full, allows full cocking from 1/2 to full - after disengaging the safety.

That is how I clock all my hammered rifles when hunting.

I can see thought that having a safe at "full bent" would to useful, however holding a rifle at full cock seems distressful on the springs. Yes - that is how most hammerless guns are carried.

However, with a hammered gun at full 'bent', there is more than a likely possibility of the hook of the hammer catching a branch and breaking it off or braking the safety if thus equipped, then if at 1/2 'bent' position. Maybe that is just "grasping for straws" & not a reality. Seeing a hammer at full bent just seems 'less safe' or "odd", safety engaged or not.