Getting back to the issue of standing while paddling, I'm looking at
Stand-up paddleboarding as a western analog. The major advantage seems to be that you're higher off the water, so you can see further. You can also see down into the water, which might be useful for things like spearfishing.
Because you're higher off the water, stand-up paddling also seems to be confined to relatively calm waters. There's an exhibit at the Field Museum where they show a number of Oceanic paddles, from standing paddles to deep-water paddles, with the statement that you can see the influence of the environment on paddle shape. Examples include having a flat tip on the paddle so that you can pole with it, having the long handle and small blade of a stand-up paddle (for calm waters), and so forth. Unfortunately, I've been unable to find a picture of that exhibit online.
Best,
F