No because the fact that Victor’s death didn’t fuel Robert’s anger. Like in his letter before he is so ashamed and frustrated and just furious but then he writes of Victor’s death, starting with “It has passed”. And like it’s super easy to say that Robert isn’t as emotional as Victor but really it’s their grief manifesting in different ways. Victor’s grief only strengthened his anger, and is what ultimately led to his demise. Robert can’t afford to have that happen. His grief numbs the anger. How can his feelings burn so bright when he lost one he had come to love so dearly? While Victor’s grief made him drunk with rage, Robert’s sobered him.