Maybe. But it all comes back to numbers, you can keep buying more and more gradually expensive items for damage, or pick up PA and convert the cheaper-at-that-point attack bonuses to damage. It lets you have more numbers.
Just like while the Monk' BAB blows, Flurry of Misses until high enough seems crappy, and taking on another -5 for Lightning Fists, -5 for Oxyrhynchus, and finally -2 for Snap Kick all seems like a terrible terrible idea. Then you buy a Wand of Waithstrike and hitting for an extra four~five attacks more than anyone suddenly becomes awesome. It's converting hit chance to damage, then mitigating those miss chances for far cheaper than attempting to buy more damage, or in this case the multiple attacks can be better than any flat bonus.