As a doctor, Chopper would never be happy to see anyone sick—after all, it was his life’s work to build a world where illness was finally eradicated.
As a friend, Chopper would watch on in fear as his captain and new family risked their lives, knowing that he would be the one to sew them back up once more.
But nevertheless there was always a part of him that would feel gratified in knowing that he finally could help those he loved. Even if a universal cure was years away, Chopper knew he could make do in the meantime.