OK, I see your point, but here is what I recall this QWERTY Wizard function was for when it was introduced many years ago. There were two main purposes:

One was to be able to noodle around and play along with the song, and there would be no 'wrong' notes. It was really just for fun.

Another more serious idea was to enter difficult rhythms. You could record rhythms without caring about the pitches. Then you could go back and drag the pitch of each note up or down as appropriate. There are still times when I use it to do this on my computer keyboard, and the timing is surprisingly accurate (more so than my bad playing).

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I just re-read the Help. In the BIAB Help, Index under Wizard, several steps are described. First, it talks about using the computer QWERTY keyboard. Then it mentions a MIDI keyboard but says there is a separate step to activate the MIDI keyboard to act as the QWERTY would (and not just be a 'regular' MIDI keyboard) with C, E, G and Bb being notes in the chord, and D,F and A being passing tones. There are checkboxes for MIDI Keyboard Wizard Enabled, and Use Wizard for Thru Part. Did you do that?

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.