If it was as simple as that it would be an easy task to make stall free aircraft right from 747s to 152 by limiting the stick movement to just before the stall.
Sadly it isnt that simple.
Aircraft manufacturers would not need to bother with all the expensive gizmos to prevent a stall in heavies but would have a simple stop before that AOA is reached .
Actually I recall from reading Langewiesches Stick and Rudder that it is that simple, and aircraft that were impossible to stall (and thus, spin) have been done in the past. Precisely by limiting elevator travel.
However, these aircraft were also a bitch to land, needed especially strengthened and long landing gear and such since they could not flare properly.