I'm not trying to stir things up, or argue, but I have used ZZ feet on SS machines and have had no problems. That is - IF the presser foot bar is adjusted properly to put the foot parallel with the dogs.
In the pics above there looks to be a misalignment of the foot to dogs to my eyes. So, buy all means put a SS foot on it and try it. If that fixes it, great. If not then an adjustment is needed.
Joe