The ocean of water and the ocean of circumstances consist of currents, eddies, strata, states, conditions and continuums, any of which one can "get caught up in" or sucked into -- and all of which remove us from our status as discrete, completely independent individuals.
Indeed, if you look at your own status aside from your conviction of your individuality, you can probably perceive the circumstances within which you are incorporated and which largely are determining what you fondly refer to as your life and your realities.
You might also be able to identify the circumstances others are caught up within, but which you are not.
In other words, no one lives as an individual completely independent of some kind of circumstances.
Everyone is affixed within some kind of incorporating circumstances, whether by action of just simply being born into them, or by volunteering to be within them, or by being forced into becoming part of them.
Being forced to remain WITHIN particular kinds of on-going circumstances is another category, a very interesting one.
So indeed, while we believe we affix our realities by choice, what is much more likely is that our realities are affixed to us by virtue of the circumstances within which we have been incorporated or gotten sucked into.