That, plus the fact that landing far from inhabited regions is safer.
What I don't understand is: Why it isn't obvious that a rocket of X height will fall over when landing on a boat of Y size in Z waves? Can you explain that element?
In general terms, tall things on boats that aren't fastened down are the most likely things to tip over. That's something any sailor can tell you. I'm interested in what considerations were at play leading up to this accident. I don't know anything about rocketry, so I kinda need that explained to me in simple terms.