The first question is, "do you know what BPMS is?"
There are a multitude of users who think BPM and BPMS are the same thing.
Perhaps, I can make it even simpler.
Which just summarized everyone else's comments.
But the "fool with the tool" is probably the biggest problem. Unfortunately, organizations are still trying to fix process with technology before they've defined the problem.
One more quote for the day, "if the only tool you have is a hammer, everything starts to look like a nail".
I'd propose to go one further, if the only tool you have is a hammer, you can make it do almost anything, but is it value-added?
So, we're back to "WHY".