Ok, let me give you an example. Say someone has some "stuff" for sale. That "stuff" is "in the same ballpark" as what you're lookin for, but the exact item you're lookin for ain't there, so you PM the seller with "hay, I saw you have blah blah for sale, might you have (fill in the blank) too? The seller says "yes, I have that too". Since (fill in the blank) was not listed in the for sale ad, your little "stupid easy" button won't work for that. Then the buyer and seller have to enter feedback manually. Even though you, me and most everybody else thinks it's easy, to some people it's not. There's always going to be something that's "outside the box" of convention.
