Exactly
High aoa protection pitches the airplane down to prevent aoa from exceeding alpha prot (sidestick neutral)
If the deceleration rate is very high, the aoa will reach a higher value, maybe avtivating alpha floor. If it is slow, the protection doesn't let the aoa to trigger alpha floor.
With an engine in MCT, deceleration rate should be relatively slow, even at max alt. If we did the experiment of retarding both thrust levers maybe alpha floor would be triggered