In last 100 years, we as hunters lost 50% of African hunting grounds (at least), for various reasons, but mostly for human population expansion, then for wars, poaching, hunting bans etc.
If this trend continues very likely the only hunting in the future could be fenced hunting. Even in the western countries, it is very much present.
So far, we determined or agreed that export of lion products to China reduces the poaching pressure on wild lions. That's one benefit for CBL.
Next question.
How about gene pool and inbreeding?
I believe I read somewhere, gene pool of captive bread lions is good, healthy and controlled and managed, while inbreeding can pose a risk to wild population in some areas.
When the issue of reintroduction of lion comes up, then CBL will become biggest source of lions for reintroduction. Besides from their genepool also they will be healthy population, and disease free - diseases that follows many wild lion populations.
Of the other iconic species, are raised and hunted in fences - rhino comes to mind, but how they are bread is different.
So, I think there is a future for CBL breathing, hunting and reintroduction programs, but also hunting organizations will have to work on code of ethics and policies and PR how to treat this phenomenon.