Bi-amping can definitely make sense. Whether it'll make a difference depends on the load your speakers present and the quality of your amplifier.
Very few people bi-amp, however, so speaker manufacturers, especially at the low end, may not feel the need to accommodate the few who do.
Biwiring has the virtue that it's a lot cheaper than bi-amping. On the other hand, it's pretty much indisputable that two cables deliver exactly the same signal to the speaker as one cable. Nevertheless, some people report that this signal sounds different. You decide.
Bi-amping does make sense. Whether it'll make a difference depends on the load your speakers present and the quality of your amplifier.