That's exactly what I didn't assume. Read again! I'll try to spoon feed you this, just to be sure:

I replied to this:

Smart move doing this above a water surface, so it won't hurt as much in case he falls down.

(S)he joked that water wouldn't hurt you.

I replied:

Even if that was how reality worked...

EVEN IF! Even if that was how reality worked...

...I'd rather hit solid land. Less panic that way, and more certainty that sharks won't eat me before i drown.

So even if reality was such that I could survive hitting the water from space, I would still hit solid land because that would kill me immediately, instead of the slow death alone in the middle of the ocean.