I’m inclined to say that anyone who draws a conclusion from Buddhism hasn’t really gotten to the point of it.
Buddhist teachings are given from two points of view, both being essential to the path. There is the relative view and the absolute view. Keeping those views in perspective is important.
On the absolute level, all forms and beings and appearances are nothing other than emptiness. Nothing really matters, there is only the diamond-like eternity of perfect existence.
On the relative level, everything matters. This is a world filled with suffering, confusion, and conflict. Buddhism doesn’t sit back and simply say, “Well all is perfect, so disregard that nonsense.” Not at all! This is what makes compassion so important. Compassion is the sane response to meeting the limiting aspects of the relative level. It is love meets meditation.
Neither of those views are the actual truth, because the truth cannot be put into a view or words. And yet both of those views are extremely important to not only our spiritual development but to our harmony in our daily lives, society, and the world at large.
Buddhism is about much more than self-liberation. It is about the liberation of all sentient beings, all societies, and all worlds regardless of the context within time and space.
Our deeds matter. Justice matters. But so does the right view of eternity and impermanence. One without the other is deluded. Believing EVERYTHING MATTERS period end of story tends to actually lead to more conflict. While the belief NOTHING MATTERS tends to lessen conflict but also can lead to indifference or despair, which again leads to conflicts and suffering.
The Buddha was well known for the Middle Way, which contrary to conventional understanding is about much more than “everything in moderation.” The Middle Way means we are not allowed to wholly reject an idea nor wholly accept an idea as The Truth. That’s what forces us to think and discern for ourselves, rather than relying on conditioning or doctrine.
Herein is the crucial difference between “studying” Buddhism and practicing Buddhism. Study without practice is not studying.
“To study the Buddha Way is to study the self. To study the self is to forget the self. To forget the self is to be actualized by myriad things. When actualized by myriad things, your body and mind as well as the bodies and minds of others drop away. No trace of enlightenment remains, and this no-trace continues endlessly.” ~ Dogen
In such a truth-saturated context, there is no room for what matters and does not matter.