It's not as if the cultivators were supposedly strong and unique. In Jin's world, most cultivators had been practising their techniques since young as a sort of passing down the family's martial arts as part of their tradition of growing up.
Otherwise, those cultivation capable people would at least learn a trick or two to survive in that harsh world of theirs where results and productivity matter and cultivation allows that. However, in this Synthesis World, none of that matters since what was important and vital was whether the Mechanoids were able to complete the mission or not. Survival was their second priority if the mission had been completed or led to failure.
