Yes, but ideally you would hope your veterans would mentor the younger players. That's what being a good teammate is all about.
Have you watched our preseason games and seen our vets tutoring the younger guys on the sidelines? If Rodgers gets hurt and has to miss 5 weeks he shouldn't want the season to be derailed so his backup being competent works towards his own legacy. There's a reason we were so successful when Drew was out. Neither Teddy or Taysom are undefeated type of starters.