It?s like the "tacking" analogy/metaphor. The tacking maneuver in sailing allows one to "go against the wind" by cutting ACROSS it (the wind). Tacking does not admit to the useless practice of continuously reversing direction and going back and forth, to no useful purpose. Unfortunately, JW?s use the frequent reversal scheme instead of any real adjustment by design.
It's quite tempting to push the analogy one step further, à la A Paduan : only going against the Wind/Spirit requires "tacking"...