Gollum wanted to blame his piteous, twisted state on others, conveniently forgetting that it was his action in murdering Deagol and claiming the Ring for his own that led to his fall. From the dawn of time, evildoers have tried to blame others for their fall, and Tolkien recognized that this lack of responsibility for actions constituted a large part of a downward spiral into evil. They are focused solely on their own wants. This is why they can never have a comrade, never a team member, but must always be alone while those who work for the good strive together with allies. Saruman used this very temptation upon Gandalf, who held wisdom enough to know his game.
Responsibility is hard, no doubt about it.
Sometimes the pursuit of good conflicts with the pursuers' own wills to be safe, happy, or to retain their property, but just as Frodo left his home, comfort and safety because he was the only one who could bear the Ring, so Aragorn left behind his heart's desire to guide and assist Frodo. The Company chosen for them did the same, each knowing that he could contribute to the Good, even if he could not see how. Most of all in faithful Sam do we see this trusting determination. I have something to do before the end, and it lies ahead, not in the Shire. Tolkien tells us of the doubts and fears of the Company, but he also tells us how they pressed on, convinced that it was their responsibility to do what they could.