I don't like the rule myself, but the only logic I can apply that makes any sense is that a successful bunt does not require an "offer". Simply holding the bat still can result in a successful bunt. However, this does require the pitch to be in the vicinity of the bat. This is the reason I don't like the rule. If the bat is held belt high and the pitch is in the dirt, etc. does not equate to a strike in my book.
Another potential reasoning is similar to a check swing. We will call SWING if the bat enters the "hitting zone", even if the pitch is a mile a way.
Maybe I am talking myself into liking this rule.
