Assuming time’s a closed loop, there’s nothing to worry about.
Admittedly, the idea of cyclical time casts disturbing implications on our notions of personal autonomy. After all, if all we do is repeat pre-established patterns, in what sense do any of us have any control at all over our surroundings?
However, we should also consider this supremely liberating. Because if we’re taking predetermined roles in established historical patterns, it’s impossible to make a mistake. Whatever you do at any given moment is by definition right. So we can relax.
If, however, time ISN’T a closed loop, we’re on our own.