True, but that would be only the second thing to try after an attempt to trim didn't work. As you say, at that point the situation seemed under control, probably was also the feeling for the pilot, but the very temporary release of the stick at time 15 45 20 has been fatal.
Question remains : During the first 10 seconds after stall warning, airplane was still in normal law, sidestick was mainly forward, but the autotrim didn't move ... Why ?
Was the THS jammed ?