You can't really think that things like dignity, maturity and humility are absent from MMA practice (much less football), do you? Surely, there are plenty of knuckleheads in MMA - but there are just as many in TMA. To train MMA or BJJ requires lots of humility, since you will certainly run across people better than yourself on a regular basis.
"In case you ever wondered what it's like to be knocked out, it's like waking up from a nightmare only to discover it wasn't a dream." -Forrest Griffin