I don´t think shouts come from the honorblade, but with the information we have now we can´t totaly discard the idea.
That´s the point, honorblades are different. You need to follow ideals with the sprenblade, or you lose the capacity of absorbing.
But maybe Honorblades only shout. That way you can actuate in a opposite way to the ideals if you want, but with the price of hearing the shouts.