Just that there is precedent. Bermuda is not in low earth orbit, but it holds little fresh water, and has to make best use of what it has. Rainwater capture is hardly novel.
Neither are CO2 scubbers. But what makes sense in Bermuda, a small densly populated island with little fresh water, makes little sense in Jersey City, which sits next to one of the largest rivers in the country, and has little need for non-potable water.