If the matter of liberation is not a personal thing, I wonder if it is actually important for there to be a mystical supramental realization of the truth, as long as one is acting according to the principle of interbeing, acting in a selfless, non-egoistic way?
From the perspective of the universe, this would seem to be more important than a half-baked, occasional semi-realization of the truth, or worse, a misguided vision. Because, from the point of view of universal well-being, it is not true that "nothing matters". The universal does matter. Where this line of thinking falls down is that it is quite likely that one will make mistakes if the vision is not complete. But if one makes a sincere attempt to understand holism, and the interplay of forces, this is still likely to be more useful than, again, a half-baked mystical vision. Actually, holism is not "rocket science". There is not a lot to understand, on a basic level. It is more true when it relates to the nitty-gritty of, say, our personal choices as consumers. But it is less true with regard to our interactions with people and nature at a direct level.
In Buddhism, this universal vision, or the acting according to the good of the whole, or the aligning of action with cosmic principles, is the wheel of dharma, the noble eightfold path. In Hinduism, it is similarly the duty of the individual to live life according to the principles of swa-dharma. But acting for the good of the whole is common to all the religions, with differing interpretation of what this actually means. Religions usually only need to take a wider view, beyond speciesism, to consider the good of the earth, in an age in which we are destroying it. It is this element of urgency which makes me think that we cannot afford to wait for mystical experience, but must rely upon our intelligence and act now.