>>102152794True. Let's analyze their characterizations a bit.
When Shiro is gone the first time, Keith goes through the stages of grief, anger being primary and showing itself in his aggression to take out Lotor. However, at first he tries to straight up refuse to pilot the black lion, even though he has shown to be capable of logic and should know the chances of Shiro being safe or even alive are probably slim. The same guy who yells at Pidge for wanting to go after her family early on instead of staying behind for Voltron wants to refuse to take the head.
When he breaks off from the group the second time, and Keith goes after him, he continues pursuing him knowing fully well that one or both of them could die. He refuses to give up on him, even after going inside the black lion and seeing that he is a clone, because that is the only living form of Shiro there is. Keith tells Shiro early in the series that his life would be different without Shiro's intervening.
On the other side, Shiro is described in the recent interview as a guy is essentially married to his missions. He wanted so badly to be great and achieve his dream before his inevitable death that he tossed away his most meaningful relationship with another person to go to Kerberos. The only person he had left to ask to see him off was Keith.
Down the road, Keith is the only of the paladins to not give up on him even when he believes that he's killed the others. Shiro is an adult, and a genius despite being retarded in relationships, there is no way he can't see that the person who is propping him up is Keith, and likewise. Without Keith he can move on to do other great things, but it's hard to say at this point if that's what his character would want. He would be dead without Keith's intervening, and most likely lonely if alive with Keith gone because he's a selfish autist and no one else will wait around for him.
