Yes you can, but levelling up doesn't necessarily help as much as you'd think. Good awareness and timing, as well as practice of the boss itself helps considerably more!
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Not to mention... I saw a video of someone doing this online. Dark Souls has tons of fan-made tutorials and walkthroughs online. And some of these are quite necessary to explain the nuances of things like parrying and Endurance that the game doesn't do a great job of explaining on its own. I see few reasons to give up altogether...