Matt, are you speaking from a WW perspective. If so, I agree a longer paddle would be preferable. But shorter paddles are the norm for most paddlers for repetitive forward stroking in FW, whether sitting or kneeling. FW may be the focus of the paddle.
However, I don't see why Accent wouldn't make a longer canoe paddle on special request, given that they make this single blade shape in presumably much longer SUPs:
On closer reading, I note the blade is "carbon reinforced". Wonder what that means. Maybe foam core, which they discuss on the Accent site.