Do things have to be the way they are right now?
Yes—RIGHT NOW they necessarily do.
But a second from now, they can be very different than they could have been. A minute from now, they can be very different than they could have been. Or an hour, a day, a month, a year from now—things can turn out differently because of an action you may choose to take right now. Things can turn out differently because of an action you may choose to NOT take right now.
You hear about people who “change history”. That’s the wrong way to think of it, really. People who “change history” are really those who have figured out how to have a substantial effect on the way things are already going at the moment.