I'm sorry to inform you on your new idea, but modes consist in all scales. And they all coincide with other scales. So what you said is not new. Like the A minor scale has the same notes as the C major scale. But your not learning the A minor scale by playing the C major scale. The tonalities are different. They are called two different scales for that reason.
Play these and you'll see.
C maj
E:---------------------------------
B:---------------------------------
G:------------2-4-5-4-2------------
D:------2-3-5-----------5-3-2------
A:--3-5-----------------------5-3--
E:---------------------------------
Now play the A minor
E:---------------------------------
B:---------------------------------
G:--------------0-2-0--------------
D:--------0-2-3-------3-2-0--------
A:--0-2-3-------------------3-2-0--
E:---------------------------------
Play the G mixolydian
E:---------------------------------
B:---------------------------------
G:---------------------------------
D:------------2-3-5-3-2------------
A:------2-3-5-----------5-3-2------
E:--3-5-----------------------5-3--
Now if you played them, you could hear a slight difference in the way the notes relate. Especially when you played up to the root and back down, that root note sticks out. When you move though each, the difference is the tonality. Although they all have the same notes, the tonal center is different. So you would be learning the scale based on what the tonal center was. Your ear is the judge, jury and executioner in every musical endevour. When playing scales, your ear will grasp more onto the tonal center than any other note in the scale. So your only confusing yourself. Although it may work in the end it's a longer process.
"My whole life is a dark room...ONE BIG DARK ROOM" - a.f.i.