Brakes allow me to shoot more and longer and more comfortably. That means more practice, more confidence, and less likelihood of flinching. Why would I intentionally make it more difficult an unpleasant to shoot when the the solution to the one downside of using them is easily mitigated by hearing protection?
I have owned rifles with muzzle brakes and killed a bunch of moose and lesser animals with them. As i age, i hope wisdom from experience help me to make decisions sometimes different than i would have made 20+ years ago.
use your muzzle brake to practice with, then take it off when actually on safari. you wont notice the recoil from your rifle when shooting dangerous game without a brake and you will save others hearing.
I guide brown bears seasonally, and others have probably seen this story but you might benefit from hearing it. had a 9 1/2'brown bear at 30-35 yards, my client shooting his .338 ultra mag complete with muzzle break was loaded and ready to go but did not see the bear. i pointed at the bear and whispered "there he is". he stepped up and i moved back and to the side (not enough) the bear stood up and he fired into the bears chest.
from that moment on, things were fuzzy and puzzled out a few minutes later. I have never had a flash bang grenade dropped on me, but i suspect that what it is like. my 375 was in my hands, i did not have ear pro in, nor was there time to place it in ones ear. if you have good ear pro in, then you cannot communicate with your client. the bear dropped to all fours and tore off thru raspberries and alders. turns out, i fired twice and hit the bear twice. i thought i shot twice but only once at the bear and once in the brush. i was thoroughly disoriented. (we recovered the bear the next day).
had that bear charged, it is hard to say if i could have done a proper job protecting the client. i suspect an elephant, lion or buffalo could cause a real problem with a disoriented guide/PH. many times there is just no opportunity to place ear pro in BEFORE shooting. African PH's are in on a magnitude of more shooting than most american guides. their hearing is at risk. I have lost quite a bit of hearing and have chronic tinnitus. I can't honestly say what caused it all, but i have likely had less exposure to firearm noise than most pH's.
I just ordered a set of AXIL hearing pro, and will report on how well it works, but....being able to communicate with your hunter is paramount and regular earplugs or muffs don't allow that. on dangerous game, the guide should have his hands on his rifle, not in his ears.
my 2 cents.