Newboomer
AH legend
I am not a bowhunter and have never shot a bow but from the looks of some of the broadheads I've seen they look like they tear quite a hole. Bigger than a slug but without the trauma. Anyway dead is dead. A good first shot is critical, be it bow or rifle. Even with a heavy caliber rifle backup is a damn good thing to have when hunting dg.That's actually a great idea. Require any client hunting dangerous game to supply a resume of sorts. It would at least help the PH see the clients level of experience. Still, the biggest thing is practice and more practice so when the blood is pumping the shoot is more instinctive.
My suggestion would be to make dg your second safari unless you have hunted dg in other parts of the world. African game is a lot different than anything else. They are tough, even the little pg, and have to be hunted differently. And they can and will hurt you. Bushbuck comes to mind.
Don't let others deter you. Opinions are like assholes, everyone has one, and many have no knowledge of what the're talking about. So, if you are competent, go for it.