I'm not holding you responsible for the opinions of other. I'm observing that you basically argued that Kirk's reaction to Kirk's death is implausible because you would be more torn up by the death of a coworker than by the death of the biological child you never wanted and don't have. But...
It feels implausible to HIM. Whether or not he has had or never chose to have a child doesn't change that fact, so I'm not really sure what you;re trying to accomplish here other than saying "I disagree."