Hmmm...is the argument that no matter how it happened, ending up with that kind of impact is dangerous and needs to be punished?
Or is there an argument that tackles or just phsyical contact can bring about these kinds of collisions and it's just part of the sport?
This is an example I always remember of where the most innocuous-looking tackle can still have horrible impact:
https://www.youtube.com/watch?v=b46GbaMTdyI