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Unless we have a way to find out what that predetermined future is, it's irrelevant and you should proceed as if it isn't a thing.
So you're saying turn to page 72.
If you like. You can also be a rebel and turn to a different page or stop reading the book altogether.
But then I'll never know how it ends!
Then you can follow the path created by the author! This kind of reminds me of The Stanley Parable.
"When Stanley came to a set of two open doors, he entered the door on his left."
But all the pages are 72. And your whole experience is also being described in real time on another page 72 elsewhere. 72s all the way down friend.
I mean technically, since we don't exist in a deterministic universe, we don't have a predetermined fate either, the concept of destiny or fate is a cope by itself. It's debatable that free will exists either. Perhaps neither fate nor free will exists, and everything is just a roll of the quantum die... Hopefully it's a D20.
Also maybe there's some concept currently beyond human comprehension that makes it so that a probabilistic universe, deterministic universe and free will can paradoxically work all together.