She wasn't talking about F1 jobs, she was talking about training posts.
In the area of healthcare that I work in, if we have a student get to the end of the course who is not able to make the transition to being a safe productive practitioner then we deem that the student has been failed by us (as the clinical team supporting and mentoring them) and by the system. It is felt that concerns should have been raised sooner and the student either supported to get there, or encouraged to go do something where they can succeed. Some people are just not suited, it's not a matter of just being clever enough or working hard enough. Getting right to the end then failing is unfair to them and a waste of resources.
My d's view is that if someone isn't going to get though the postgrad exams or get into specialty training, then why has 'the system' not identified them and redirected them earlier, bearing in mind the timescales and financial costs involved for both the student and the system. Why should 'everyone' pass the UKMLA if they're not all going to make the grade in terms of getting into specialty training? How is staying around until they fail ARCP helping that student?
Of course I think that UKMGs should take priority when it comes to specialty training, but that's not the same as saying that every UKMG should get a training post. And it's not the same as saying UKMGs are rubbish.