Bears usually avoid human beings but there is an occasional attack due to cubs being around or the bear is starving. Where do you think the term, “bear market” originated?
Mountain lions are usually very solitary and attacks on humans are rare. Between 1890 and 2004 about 20 people have died from being attacked.
Why should we add more predators to those that are already out there? You want to see more human beings die?
Under that logic, should we kill all domestic dogs? Domestic dogs kill 12 people per year on average.