I think we are exaggerating a bit. The Selous is very large, and this will only impact a portion of it.
But seriously - do we compare the desires of "sportsmen" with the needs of impoverished rural Africans? We have exploited our own countries (and much of the rest of the world - just ask them!) to achieve an enviable standard of living and now we want to deny that right to everyone else?
The bottom line is that yes, it is "we" that have to be involved if "we" care to have wild places maintained in that form for ourselves and our children. I have no moral right to ask any African to go hungry to ensure my ability to hunt wild game, and either do you.
This is not the same as saying African people are not responsible for much of the plight in which the continent is found today. Of course there is a gross failure of leadership, and a kleptocratic culture, through much of the continent. But that gives us no right to insist that any wild lands be maintained there for our hunting pleasure. We can, though, work with people to find alternatives. Or not, in which case we can watch wild lands be gobbled up for development, and complain about it.