Yup, if you are casting overhead, and are close to it, and somewhat consistent with the mechanics, then the lure can't help but travel in line to the target, any variation in timing or stroke will manifest in missing the target short or long. When casting off that angle there will be an X and Y component which will vary independently (reason why your second serve in tennis should be primarily a topspin). So one isn't more or less accurate with an overhead v a side arm, it just appears that way. Like a golf stroke, tennis serve, or acquiring a target and pulling (misnomer) the trigger, the key is consistency derived from the muscle memory of repetition. While the stroke and release are different in BC and spinning, they share a lot in common, I find that besides the timing of the release, the follow through direction is off when folks can't cat accurately.