My statement was "Some things just do not do well or don't thrive in captivity, such as primates."
It has everything to do with the animal living well and "thriving" not with anyone’s safety per say. Although there not thriving does lead to safety issues. Primates know that they are being kept as a pet and they do not like it. That is why they become violent. They are acting out like a teen will. The difference is that they are 100 times stronger. Unless you can provide said primate with an extensive plot of land with ample things to keep it occupied and secure from the outside populace. No one should own one.