Good points.
Just in addition you mention power and accuracy being the focus? What part of learning how to hit a stationary object does not help build your power and accuracy? Like using the wooden man as an example here, we were probably all taught ideas like "remember, this is a dummy! It's dead and doesn't move!! So you must put in extra work" and I see this Pole Dummy no differently. It can be used to build your confidence slowly before moving onto live interactive drills with a partner/s simply because it doesn't move. The more skilled drills you shared are all part of this progression too.
A boxers heavy bag doesn't move like a person either, nor does their speed ball, but should we discount the benefits it has on the overall development of the boxer?
Ultimately I think all the solo training with apparatus like this is designed to prepare the student for 'impact' and to build your level of applying and receiving such impact. A key to developing your Art prior to any attempt to use it all for real...