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He "wasn't" or "never was" ready, he has doubts with his abillity to hold the sturgeon. The fact that this sturgeon was referenced as a Female, references that this is a metaphor for how he wasn't ready and able to keep his children from being taken away. ( His internal struggle )

Rule of three is heavily significant, we see this with him saying he wasn't ready three times. and many times was other shit said 3 times.