Usually when people ask questions like "is true Aikido effective for disarming", they are looking for a guarantee. They want someone to assure them that if they eat their vitamins, say their prayers, and put the time in, they will be able to beat up the toughest guy on the block. The truth is, no such system can ever exist.
This is a way saying things like, Filipino fighting system "X" is better then Japanese system "Z" is a waste of time. All we can do is learn, keep an open mind, and learn.
When it comes to weapons, there are most certainly better ways to train than others. Saying a method is better than another method is most certainly "not a waste of time".
IMO, particularly when one has seen consistent results comparing various methods and people in them over the years.
I think stating "All training is equal"
is the PC version of "martial art speak," often espoused by those with limited exposure to more sophisticated methods and models. No harm, no foul, it's just simply all they are capable of seeing.
Case in point:
You yourself have made the argument that for ring fighting or one on one fighting, aikido is not the best or most suited method. In your view aikido is best for multiple attacks and for weapons.
In much the same way I would say that for a host of reasons...when it comes to weapons work...aikido foot work and movement and its use of-weapons are most certainly not
the best or most efficient method for fighting with weapons as judged by every person who has reached a certain level of exposure and experience I am familiar with or have read of.
I've also never seen or heard of experienced weapons people leaving their art and opting for aiki-weapons and aikido movement as a superior method of effective weapons work...not even once, instead the opposite is true.
While I understand that may be difficult to hear and process, it speaks to the ever increasing exposure aikido-ka have had to traditional weapons work and their oft repeated commentary both public and private. You can then up the anti, to include people who have trained traditional and modern weapons and then also went on to train with armor and freestyle full contact work.