Water flows downhill. We all know this, and we all (implicitly) understand the idea. Water is flexible and subject to the forces of gravity. Terrain has high points and low points. Water follows the path of least resistance to reach its destination.
Water isn’t the only thing that behaves in this way. I think people behave in an identical fashion. Once the destination is determined and “terrain” is clearly visible, the path of least resistance becomes obvious. Unlike water, though, humans have to define the final resting point as precisely as possible. If you don’t define it, it may define you: you will find yourself moving towards a destination you didn’t expect, and may not want.
You will flow along a path of least resistance. The key question is where do you want to end up? If multiple paths seem equally appealing, you may have not defined the destination with enough clarity.