Do Fighters Need To Make Adjustments In Training Methods?

The injury bug continues to rear its ugly head and several fighters have had to drop out of fights within the last month or so.  A list off the top of my head is below:

Anthony Johnson, Alistair Overeem, James Irvin, Houston Alexander, Rousimar Palhares, Yushin Okami, and Thiago Tavares.

Being an athlete myself, I understand that injuries are apart of the job.  I understand that fighters go into fights less than 100% all the time.  We routinely see footage of fighters sparring without any headgear, shin guards, and padding to protect themselves from body shots.  I know that fighters need to be hit to become accustomed to the shots, but I'm sure that injuries occur because of fighters refusing to wear this protective equipment as well.  I'm sure that injuries occur while fighters are grappling and/or training to stop takedowns.  It's part of the game, as I've been a victim of that myself.  There just have to be better methods out there.

This is just pure conjecture on my part, but I think many of the fighters of today are still using old school training methods that make the fighters more prone to injuries.  Just because those methods are proven to work doesn't mean there are not better and safer ways to get the job done.  I understand that every fighter does not have the best gym/technology at their disposal.  However, if a fighter is repeatedly getting injured then maybe they should re-evaluate their training methods and make the necessary adjustments.

What do you think?