At all ages, no athlete wants to take him or herself off the field, and coaches don't want to force them. However, an already difficult situation becomes next to impossible when you add in the ever-compelling element of money.
The 2011 Draft produced six starters, 2012 produced five (with Nick Foles almost making it six) and 2013 has produced two. This means that 13 positions have turned over in three years -- an incredible development at the most critical position in football.
Mike Shanahan has cited the obvious reason for keeping Robert Griffin off the field: that he does not want to risk further injury to his budding superstar, who is still just 23 years old. But it's a risk has taken before.
Graduates should proactively help those with less experience, even if they don't think of themselves as "traditional mentors:" accomplished, old people with invaluable wisdom pouring out of their ears.