They are, after all, less used to polyphonic textures. Some musicians consider it a sin to perform Bach on the modern piano. Similarly, Haydn, Mozart, Beethoven and Schubert are supposed to be more enjoyable on the fortepianos of their times. Maybe Elliott Carter. Many of the others were intended for the clavichord, a sensitive and lively instrument of such delicacy that its tone cannot be heard in a space larger than a drawing room.
Some pieces suggest the clavichord, others the harpsichord, organ or pedal harpsichord.
None of these can do justice to all of the preludes and fugues. The modern piano can. Bach gives no guidance on the choice of instrument. We can only assume that these were meant for the keyboard, so eminently playable are they by two hands. To convey the music's universal message, we must not get stuck arguing about instruments.