Maybe it isn't a dichotomy, maybe they're not mutually exclusive.
I've always liked that quote from Gladiator "what we do in life, echoes in eternity", to me it speaks to the implications of our choices to realms beyond this one, and times beyond this one. And in that sense, maybe changing the personal choices affects one's immediate reality, one's perception of life and one's reaction to these happenings of life. What was once a tragedy, for instance, might seem a tiny nuisance if one changes one's level of awareness, or a blessing, but then that also changes the experience that others have of ourselves, or the relationships we create and let go of, which might have implications in their own awareness, their own expectations and their own programs.
I think most of the truly significant events in our lives (if not all) are born out of relationships, and the C's did say that relationships in 4D were more important than in 3D. All of our good memories, the ones we draw strength from and the traumatizing ones, everything was born out of interacting with another soul. So, working on ourselves, is the best way to "change" reality, but it isn't that we're going to "change the world for the better" because, we can't for one, and two.. that "for the better" is terribly subjective and also.. it's a concept that may change as we learn, but also, it isn't our task to change the world, the world itself exists for the purpose of learning, it's like a course.. and the course remains for those who need it, the student moves on.
There will always be tyranny and lies, evil, and self serving leaders, misery, cruelty and so on, that won't cease because we spread knowledge, or because we learn ourselves, but our perception of it can change, and that shift in vision changes the world for those who learn, and that represents a reality shift even if it means stepping into reality seeing it more whole than before.
That isn't to say that we can't have a practical effect on someone else, but that impact is individual on a soul looking for resonating information. Just today for instance, it was shared with me that this guy
recommended SOTT to his audience, so the collective work SOTT does, all by individuals, resonates with someone they had no clue was paying attention. Will that change the world? not really, but will it have an effect on his perception? sure... and it may affect his choices, which will affect the experiences he has, and others have of him and that can reverberate at several levels, echoing in eternity.
So, I do think it matters, or maybe not "matters" but.. the choices we make, specially those that implicate others, do have an effect that we can't yet comprehend at a larger collective level, and that all began with the individual work that each of us does. Sometimes it's by inspiration, sometimes it's by conveying information, sometimes it's by teaching, sometimes it may simply be by refusing to align oneself with a lie.
What I do think is that this work on the self can't be perceived or initiated hoping for a pot of gold at the end, it has to be a very personal choice, private almost, that then shines out. Because in the end, that's all we really can offer, what we've done with ourselves, as the parable of the talents.
In summary, I think what we do is as important as it is to us, personally, because we attach importance to our choices, and those choices affect the universes's experience of us and that can have a larger effect, but that shouldn't be the goal, the goal should remain personal, and the rest is an effect of the choices we've made for ourselves. I hope that makes sense.