Best I recall Francisco Bustamonte used to do it, others of the Filipino contingent. It was almost a Filipino thing for awhile. Those big loopy strokes and the tip low and left until the final stroke when contact was made. The reason I have heard given was to avoid blocking the view of the relationship between cue ball and object ball. I was a little skeptical of this answer but who knows? I do know that some of the old school hustlers did deliberately have the tip aimed somewhere else until the final stroke when they put the spin on needed to make a shot work. They were very deliberately trying to not give away anything that the other player might not know.
Hu