Strange yes, but fear not, method to the madness used to be my motto.... now it's just madness....
Maxim point's them out, it's all about manufacture-ability..... no use in theoretically having the perfect block, when in practice it's impossible to make, now is there
Remember that we are severally limited by the tools to our disposal, not to mention those cut-off disks are actually damn expensive, considering that they are very much a consumable in the manufacturing process..