I don’t know how it could happen.
I can assure you it has happened, I suspect somewhere hidden in it will mention minimum performance requirements. Think about it for a minute no company is going to put itself at risk of a major financial loss because somebody isn't up to standard and all the aptitude tests in the world won't necessarily show that until they start. On a course of say 18 there used to be at least 1 or 2 students I often wondered how they ever passed 'selection', usually they failed several progress tests/exams before being re-coursed it is here that the 'protection' would be cancelled and they proceeded at their own financial risk.
Referring to your previous posts you need to make your mind up as to who to trust, somebody selling you an expensive dream or several pilots/instructors with years of real-world experience offering free advice.