Idiots and Joes have much less of a problem with a price like 12 thousand bits or even 120 million bits than with a price like 0.0012 BTC. Me included.
And presumably that's why wine (say) is sold in 750ml bottles, as opposed to 0.75l bottles. But that doesn't seem to be an argument in support of moving the decimal point 2, 3 or 6 places.