thye rowing motion is very similar to a snatch lift

To get an idea what its like to effectively row a race, take the hardest stroke you can on a rowing machine take that down about 85-90 percent, then try to do that 220 times in a row without stopping. The only rest you get is during the "recovery phase" and that varies during the course of a race depending on your position.

A 2000 meter race is essentially a 6 minute, all out sprint

Then you have to worryabout blade work. You go in too shallow or to deep there is a good chance that you'll "crab" which at best will stop the speed of your boat, at worse you'll get thrown out of the boat, or suffer some bodily injury.