Within my own extended family (where there is blood bond), there are examples of parents or children not liking each other, fed up with each other, estrangement, manipulation, etc.
With blood bond, I admit there is probably an increased chance of a good/strong bond between parent and child when compared to alternatives (adoption or stepchildren) but it is not full proof. For example, studies show that there is more abuse shown towards nonbiological children when compared to biological children, but there are still plenty of cases where parents commit abuse on biological children and don't show love. I would not focus too much on statistics.