Yes, resistance alone leads to damage in my view. Thus one of the major principles of Aikido is non-resistance.
Teaching this from day one is imperative from my view otherwise it is merely a shell of Aikido which is being done.
I have studied in several schools for extended periods of time and have experienced those that preach absolute non resistance and those that preach strong resistancewhile training. Both, are hopeless, in my opinion. You need to train in-between most of the time, and from time to time, go to either extreme (not just a bit, but a lot at either extreme, then back tothe middle).