I guess some are trying to keep costs down, which is false economy. Without regular checks on back, feet and general health issues, knowledgeable feedback from riders and empathy, things will go unnoticed and could get progressively worse. Can't even rely on riders to detect problems as most haven't a clue if something is wrong under them. Some trainers have too many horses to be that close to them and have to rely on feedback from those who may not have the expertise or experience to detect early signs of problems. Personally, I would not trust them 100%. I won't bother to say what I would do if I had a horse in training, because, unfortunately, I probably never will now