The real issue is not whether baking biscuits is meaningful, but the extent to which the activity can seem to be so after it has been continuously stretched and subdivided across five thousand lives.
Destiny ... a word which means more than we can find any definitions for. It is a word which can have no meaning in a mechanical universe: if that which is wound up must run down, what destiny is there in that? Destiny is not necessitarianism, and it is not caprice: it is something essentially meaningful. Each man has his destiny, though some men are undoubtedly "men of destiny" in a sense in which most men are not.
I have not been part of an active counterculture movement, as it is not the approach that I have personally pursued to create a qualitatively beneficial and meaningful impact on society.
For the rest of your life to be as meaningful as possible, engage in spiritual practice if you can. It is nothing more than acting out of concern for others. If you practice sincerely and with persistence, little by little, step by step you will gradually reorder your habits and attitudes so as to think less about your own narrow concerns and more about others' - and thereby find peace and happiness yourself.