No! The existence of a behavior doesn’t mean it’s natural. In other words, the behavior of people or animals doesn’t mean they are born that way.
The existence of something doesn’t mean it is ought to be. This is a logical fallacy named (Is – Ought fallacy).
There are countless behaviors shared between people and animals alike, and they don’t arise from biological necessity. Actually, the majority of behaviors are a result of external effecting factors more than internal biological factors.