Given that clubs stick by players who are accused of all sorts of crimes, is it really that unbelievable that one bad challenge on the football pitch doesn't instantly get a player sacked? Your club would do exactly the same and probably have done in the past.
And we do have form for getting rid of youth players with bad attitudes and even drug problems. We used to be a club that had a strong "no dickheads" rule under Nuno, but that unfortunately seems to be waning in recent years.