Apparently, in this case humans already are giving advantages to baboons and if they multiply too many - humans again will need to intervene to kill them to maintain their "normal" numbers.
The solution to the worm and other parasites is very simple - boil your water before using it. Swim only in pools that have been threated against parasites. Instead the offered solution is to sterilize all water in nature - in jungle environment, that is infested with life, that by nature is hostile to humans and others. I suppose, that the thinking of eradication of these worms comes from how they are dealing with malaria.