It is possible to do it right and possible to do it wrong using almost any method you chose to follow.
All methods can screw up a horse.
Too much, too little, too often, not often enough, too strong, too weak, too fast, too slow, too late, too many repetitions, not enough repetitions, too little variety, too much variety.
Good trainers always start with trust and connection, but trust and connection is only the beginning.
It isn’t easy. If it was easy, everyone would be doing it.