I believe everything is connected and can not truly be understood when separated from the whole. By trying to have it in a closed system you are only able to understand the core of it or a piece. Like having water in a distiller. You can see it as a fluid, boil, become a gas, and become a fluid again. You could even freeze it and see it become a solid. But by studying it in this closed system you only see certain aspects of it.
When left alone in the world it is much more diverse, there are clouds that contain other gases along with water, rivers, lakes, oceans, groundwater, natural springs, caves with stalagmites and stalactites, and among other things.
These things are created by the connection of various factors. We can see how on a bigger scale that the water system affects individual aspects/systems (for example cave formation) but it is harder to connect it all and see how all things connect and influence each other.
Even peoples reactions and responses, though it can seem random, it is done for a reason. This reason they, themselves may not realize, but it happened all the same. I would not be able to guess what a person does and be right 100% of the time because I am looking through the lens that I see the world.
On a slightly different thought process in regards to water. Water has also played a role in religions. It has been seen as rebirth, to purify something, and in divination. Some people use water as a way to tell the future. The belief that it is connected to time or a way to clear the mind to see the future through our own minds. And in some books water has been used as a medium to store memories or gain access to past memories. So water itself has been connected with time.
Building on the idea that water is used to store things or act as a container. Water also has a bunch of living organisms living in it. Microbes, minerals, organisms... all this together is what I believe makes water a living organism. We can separate the water from it for drinking and other uses. But we may be missing out on some of our evolutionary advances by doing that. True that most water sources are to contaminated to be beneficial because of chemicals, runoff, and harmful organisms that could make a person sick or result in death. But at some point in human evolution humans bodies have adapted to work with beneficial microbes. Like the bacteria that helps with food digestion, or the mitochondria. The mitochondria has its own DNA, some scientists believe that it originally was a bacteria that entered the cells and coexisted with that life forms. The same with plants, like the mitochondria, the chloroplast in plants has its own set of DNA.
So now that I have jumped around a lot and more or less just spit out all my thoughts, I think I will stop with this. I do not think true randomness exists. Only that we do not understand it, like people have previously mentioned. Its all connected and affects each other. Just because we do not see the connection now does not mean it doesn't exist.