I don't believe that. In fact, this entire thread starts with these words:
I agree that it sounds as if those are major seventh chords. But CP theory (and this includes Baroque) doesn't recognize these as chords. And I think Bach thought contrapuntally (not harmonically except in a very general sense).
This shows us that Bach and contrapuntal music in general is not based on how things sound harmonically, but is based on strictly-defined voice-leading procedures and concepts of "non-harmonic tones."