this theory was proved wrong in the manga were during a scrim fight between class 1a and class 1b midoriya gets knocked out and taps deeper into one for alls past user werr he gets to see there physical forms in his mind except for the first 3 users
Anyways the holder of all for one before all mights master had a quirk called black whips which were just a shadowy like whip with physical properties, therefore the previous owner of the quirk explains that not one member has ever tapped into one for alls previous iterations, relating to the fact and realization that all previous quirks from previous users can be additionally manifested and used by the current user back to the scrim midoriya regains consciousness and uses the previous users black whips quirk
