I rarely think in terms of free will. That is a leftover concept from theism.
And it may be impossible to predict the long-term outcome of our actions, but that seems to be a bit beside the point. What we know for a fact is that the capitalistic system (which I benefit greatly from just by being born in one of the richest countries in the world) is made so that someone has to fail in order for someone else to succeed. This premise doesn't exaclty pave the way for selfless action, but in my experience, selfless action is always most rewarding. The motive is perhaps more important in judging the moral value of actions, but that is another debate. I am capable of experiencing the interconnectedness of everything, and I see the illusory nature of all things (not trying to brag or anything, I'm just saying that I value this perspective), but that doesn't mean I should ignore these illusions. But having seen them for what they really are, I am more capable of navigating this world of illusions without getting sidetracked, mired down and miserable. From the perspective of oneness we cannot really do anything, since doing anything would break the perspective. But we have to act, it is the way of life, and it seems to me that clinging to the "true state of reality" by severing all attachments is a denial of the gift of life.