It's entirely possible for that to happen as part of a careless foul, or even just in the course of normal play - see the Diaz injury in the Liverpool/Cardiff game, which was a nasty studs-in-the-knee injury that was 100% accidental, happened in the normal course of play and was correctly judged as not even a foul.I think it proves that PGMOL and I have a different concept of what a "glancing blow" means.
It's as if PGMOL have engaged the No. 10 press office to explain that raking with the studs is a typical work event.
Show me a video of when your injury occurred and you might have a case, but a still photo of an injury post-match proves nothing. And you're a qualified referee, I shouldn't have to tell you that.