In the TK accident, the pilots made mistakes, that's right. But we cannot ignore that the aircraft was not really fit to fly :
"The data show instances of left radio altimeter malfunctions on some of the nine previous flights. In the recorded cases, the autothrottle also entered the retard mode above the intended flare altitude, and the thrust levers moved to idle, because of a malfunction of the left radio altimeter on two of the nine flights. The data of these flights are being investigated."