Likely the reason some of us seconded (or at least accepted) said line from V, responds to empathizing with the tragedy of a person who was forcibly made into a powerful weapon of corrupt aspirations; a person cursed by her own talent and victimized at the cost of her life expectancy and humanity.
However, V (as many in Night City) can also be considered somewhat a victim of forceful circumstances. Unless we are to consider the miserable life of the common Night City folk a reasonable choice, it could be argued that V was "forced" into the life of a mercenary costing him his closest friend and his life expectancy (and humanity, to some extent?). But V's desperation didn't turn him into a deadly master manipulator as Songbird…
Maybe we seconded V's sentiment toward Songbird because we empathized with the tragedy of another even while facing our own, and even while acknowledging that that person might not be deserving of it.
Maybe that's part of Pondsmith's iconic assertion: "Cyberpunk is not about saving the world, it is about saving yourself".