Thats true, digital accordions don't need reeds to make music,
but most models of midi and digital accordions still have the traditional acoustic-providing reeds, with the digital circuitry added.
This allows for the box to be played thru reeds alone, or thru the digital voices alone, or both can be played/layered.
The long-time traditional players usually want those reeds and frown upon the newer technolgy.

Its the reedless models that are much lighter in weight and most major accordion makers produce a reedless model where all sound comes from their internal sound engines, just like our keyboards.
The quality level of the digitally-made accordion voices has increased so the need for the reed blocks and the maintenance for keeping them in tune, are decreasing.

Did I make it more confusing?
Probably