Sorry for a car analogy, but that’s like saying that cruise control makes zero sense as long as you have a functioning gas pedal.

Not in my experience, unless you use “Loud” setting.

Actually, I captured the output of the app when playing “Anne Sophie-Mutter / Vivaldi: Le quattro stagioni / 12. L’inverno: III Allegro”, which has:

  Loudness,  Sample peak,          RMS
-19.0 LUFS,   -0.49 dBFS,  -24.24 dBFS - capture_norm_off.flac

and I got literally the same data, to the sample, with normalization turned on.