In all seriousness, compare ringside medicine and how long fights went on prior to the 1990s and what happens now.
I see your point and agree boxing has upped its game with regard to fighter welfare.
It is still a sport that promotes punching to the head though and it only takes one punch as they say.... Everybody at all levels of rugby league who lace up a boot knows the risks involved. The head high shoulder charges we are talking about here are mainly the result of poor technique or the attacker ducking into the tackle at the last moment. Done correctly the shoulder charge benefits our game and sets us apart from other codes.
I'll say it again, lets heavily increase the tariff for the bad shots, but don't penalise those players who can use this skill well (and yes I do believe the well timed shoulder charge is a skill).