If fighters are willing to step in front of their training partners for the title then they should be willing to fight each other, simple.
Jumping in front of Rashad?!
What are you talking about?
Rashad was in fron of everyone for almost one year, waiting for his title shot.
Not wanting to fight your teammate, because you consider him like family or you have certain moral values, is one thing.
Passing out on the opportunity to fight for a world championship belt, especially when your teammate is injured and you don't know when and/or in what shape he comes back...is a whole different thing!
Comparing these situations is like comparing onions and oranges.
I don't think Junior dos Santos felt sorry when he knew he got a title shot...and poor Nog had to fight off injuries.
Even if that situation didn't imply a title shot for both guys.
Pride GP, 2005: Shogun beat Overeem in the semifinal.
In the other semifinal, Wanderlei was fighting Arona.
At that moment, Wanderlei and Shogun were training partners.
They could have met in the final, but Arona beat Silva and thus, the MMA community/fans were robbed from a fight that would have been very very interesting to watch.
Shogun eventually destroyed Arona, i assume you know that.
But i don't think he was tormented by guilt or other sentimental feeling because Arona beat Silva. In fact, i believe he was more pumped than ever, trying, not only to beat Arona and win the title, but also avenge Silva's loss in the process.
PS: That fight not happening is one of my biggest regrets about MMA!