That's just the basics, it goes further beyond that. Because women are more impressionable by strong men, a good father actually have more sway with her choice of partner than with his son as well. This means that not only are you certain your daughters son actually is your grandson, it means you have greater impact on the other half of his DNA.
Not to mention that a mother have more emotional influence on sons, so you'd even have greater influence on this grandchild through her. Observe a curious fact, how grandparents tend to favor their daughter's children. It's an instinctual sort of wisdom, and when you first start to see it it's remarkably consistent.
For a tribal king it would actually be much better for dynastic stability if his crown passed to his first grandson by his daughter rather than directly to his son. The only reason we haven't done it that way is because it's too wide a time gap and thus impractical.
As I always say in these sorts of threads, this whole sad situation we have wound up with, where women are going crazy and running wild, is a failure of us men. Sons are resilient and have a good chance of turning out ok even with a hard background, daughters less so. Without a stable father who is not afraid of women they are adrift at sea.
This is not new, it's been a problem for a long time.
I don't like this new way of thinking. Historically the term animal has directly contrasted human. This type of newspeak is akin to the stuff with gender and sex and so forth.
Materialists of today like to think humans are as predictable as animals, and if only their methods of systematizing behavior were sophisticated enough, they would see the patterns. But this idea is based mostly on emotionally wanting it to be true than by any objective reason. It's never been proved that humans can consistently be predicted.
While it's true we are both biological machines of sorts, humans are not like animals and by claiming they are you are degrading yourself. Not only are humans unique in so many properties among the biomass here on this world, but we have no ability to communicate with animals to the extent that we would know whether they too have spirit in the same sense.
I know of no example of an animal who were able to suppress it's instincts on it's own.