Monkeys and apes do not treat humans as their offspring because they can recognize and differentiate between members of their own species and members of other species. While humans share a common ancestor with monkeys and apes, we belong to different species, and animals generally have a strong instinct to care for and nurture their own offspring or members of their own social group.
Parental care and bonding are essential behaviors in the animal kingdom for ensuring the survival and well-being of the species. Monkeys and apes are no exception to this, and they display intricate social behaviors and relationships within their own groups. Their ability to recognize and distinguish between individuals of their own species and other species helps them ensure the survival and success of their own offspring and social group.
When humans interact with monkeys or apes, the animals may exhibit curiosity, fear, or aggression depending on the context and their previous experiences with humans. But, in general, they will not treat humans as their offspring or as members of their social group because they can recognize the differences in appearance, behavior, and communication between humans and their own kind.
It's important to remember that while there may be instances of cross-species interactions where animals show interest in or curiosity towards humans, their instinctual behaviors are primarily driven by the need to interact with members of their own species to ensure their survival and reproductive success.