Originally Posted by teacherbailey
If the seams are all the same, you'll be fine and the only difference might be a slightly smaller quilt than the pattern says. Why make it harder than it is?
In theory I agree with you and when you work on your own stuff from start to finish, you will be just fine. However, when you participate in a swap, then the blocks need to be 12.5" and some patterns do not end up as 12.5" when sewn with a regular seam. So in my experience, the scant seam sometimes comes in handy.