not below" altitude and by my calculations happens to be fully 900ft below the "normal" profile for the RNAV approach.
There is no profile at BIDPE yet, as there is no profile at COLIG, profile doesn't start before FAF. You look at a straight line and the picture confuses you because this is just a drawing, it is out of scale and it is meant to be a shortcut. Also if you don't like "altitude check" (I didn't invent this term) you may call it step-down fix. Everybody familiar with IFR operations should know what step-down fix is.
So what profile would you use down final, or would you just "dive and drive"?
Dive& drive is a perfectly valid choice, it all depends on aircraft equipment.