Yes the size of the box is a large obstacle, however, there was a time when the shipping for a box of foamboard was pretty reasonable (especially taking in the size factor). Recently the prices went up quite a bit and most people have accredited it to the new partnership with what'stheirface. I don't know if that is the only reason for the change in shipping cost, but anyways that is my perspective.
Also, I understand where you are coming from, I was once a fanboy like you
but sadly life has taken its toll on me and I've become a grumpy codger at the ripe old age of 17, and so I like to fuss about any and all minor inconveniences I can think of
.