Why would you suggest that dispensationalists only inhabit "dispensational churches"? The error is widespread.
It’s because his language does not suggest a dispensational perspective. That plus his church choice, plus his background all add up to something other than dispensationalism to me.
There is also the issue that many consider this a purely apocryphal, unsubstantiated story that was put out by enemies.
My sense is that there’s “some” truth to it, but that it has all the earmarks of a story told and retold and grown distorted in that retelling.