My personal opinion is that the dovetailed front scope mount on a Mauser doesn't pose any particular safety problem.
Keep in mind that the bolt lug is in contact with only the rear vertical surface of the lug recess and a dovetail does not alter that relationship.
In order for there to be a failure radiating from the chamber, the entire barrel shank would have to fail. Short of a gross error in reloading (excess powder or wrong size bullet) or a barrel obstruction, that will not happen.

Now, having said that, I agree that the dovetail is not as attractive as a barrel mounted front scope mount.