Yes to some recreational school. Especially true of a great many competition schools. If a school is truly a professional school then by its very definition the training would be proper. Students would not be rushed into pointe before they are ready. Some schools have what they call a “pre-professional” program that are very far from being that. When it comes to ballet training most professional schools will be an affiliate feeder school to a professional ballet company. There are a few professional stand alone schools but they are well known. Regarding good recreational schools, all you need to do is see where the teachers were trained and danced professionally to be assured of proper training. Dance teachers basically pass down the same training they received. Of course don’t neglect to check out the facility for proper flooring and size.
Regarding physical abuse, fortunately that no loner is as prevalent as it once was. You may still find that in schools in China. Less likely in Russia where that way of training used to be the norm. Students in Russia were vigorously screen for body and facility so it was hard to push beyond natural capability because they all were capable of achievement. Years ago, I heard stories of threats with a burning cigarette if you didn’t get your leg higher. Competition schools often force students beyond their body’s ability causing injury and not the kind of training I would recommend to anyone,
Edit for additional: I agree that the best trained teacher doesn’t guarantee that they are capable of doing the same for others. . However bad training of teachers guarantees bad training of students. Teachers teach what and how they have been taught. When I talk about what I consider good training it usually doesn’t mean a dance teacher’s course, but serious ballet training at a world class school usually followed by a ballet career then teaching after retirement from performing. Not all professional dancers are great teachers, but that reflects more their natural abilities to teach not their training.