In the States, Europe, and South America, I think the question is more about aesthetics. However, any rifle I take to Africa has iron sights, and more importantly, a quickly dismountable scope.
On my first safari some fifteen years ago or so, I used a wonderful custom .338 built as a English styled express rifle. It has generous, effective open sights. I attached a quality scope to it in fixed mounts. My PH offered an "option" for leopard in those days where if one were taken on a PG hunt, one simply paid the trophy fee. To cut to the chase, I shot a cat over bait at around 9 pm (spotlight) a few days later (then legal in Namibia). He had vanished after I came out of recoil. At the bait we found blood and his prints racing up a shallow dry creek bed (waist high) overhung with acacia (think the blackest tunnel you have ever seen). Nick Nolte and I edged up that creek shoulder to shoulder with his tracker's arm between us holding a spotlight. Nick had his open sighted .470 and I was carrying the .338 with its firmly fixed telescopic sight - about as useful as a 2x4. I would probably been better off holding it by the barrel as a club. Fortunately, we found the cat stone dead after forty yards around the first little bend.
Three years later I was back in Namibia when Nick was called by a neighbor asking for help with a wounded leopard. I was on a lazy PG /tourist adventure with my wife but had brought along the same .338. Nick asked if I wanted to come along and "help." How do you answer that one and maintain one's manhood? We chased that cat around a roughly 500 acre acacia thicket for about three hours before it became too hot for the little Jack Russels to hold the scent. I have always been extremely grateful we didn't catch up with him in that thick stuff. But at least the .338 then wore Talley mounts and wasn't wearing a scope during that little exercise.
I have several rifles without sights to include a couple of lovely custom pieces. But if there is the remotest chance that a rifle could possibly be used on a follow-up on a dangerous game animal of any type, you can bet it has irons and a dismountable scope. For me, a 9.3 would certainly fit that category.