Imagine spending your time trying to come up with some new defense of a version of the Bible, namely the KJV. Something pithy, a quip, something that sounds intellectual, another alleged "gotcha all now" line, something fresh and new, another lecture to defend the errors in the text, a new spin to defend the indefensible.
Then standing before the KJVO cultists to preach about a version with some translational erros, not about Christ.
I'd imagine if a person went to exposit the Gospel and Christ this same crowd wouldn't be as interested, nor would the speaker be as interested to "preach."