Am I wasting money on the theory of Bi-amping?

As a long time audiophile I'm finally able to bi-amp my setup. I'm using two identical amps in a vertical bi-amp configuration. 
 

Now me not fully understanding all of the ins/outs of internal speaker crossovers and what not. I've read quite a few people tell me that bi-amping like I'm doing whether it's vertical or horizontal bi-amping is a waste since there's really not a improvement because of how speaker manufacturers design the internal crossovers. 
 

Can anyone explain to a third grader how it's beneficial or if the naysayers are correct in the statement?