It is about using the right weapon and cartridge for each species of game without going to extremes.

I also don't always understand why some people torture themselves with big bore rifles to hunt smaller game, weapons primarily intended for big game hunting, especially when it seems that these people don't use this rifles to hunt big game in Africa.

Things are but different in Africa. One tends to have the feeling that the majority of hunters in Africa are often under-gunned and that in this case one should test the tolerance for each hunter as far as shooting big bores is concerned. Use enough gun is a rule that applies especially in Africa when it comes to hunting big game or having the ability to defend yourself against an attack by a dangerous animal species. The whole system is but based on the binomial Client + PH so that many do not understand, or don't want to understand, what it is about. That is an another topic and some know what my opinion is.

Sure, you can have too much gun for Africa, but not with rifles caliber 416 Rigby, 458 Lott, 470 NE or even 500 Jeffery, among others things and for example.