That is a poor assumption. I know many RJ "Lifers" in their 40's that would be happy as all get out to get out of there. They were be even more for it if they knew that going to any of the majors would mean progression with no more scope sales. The true fear they have is that once again the job they take at the bottom of our list will be sold for pay, or retirement credits.
You hold or push back the limit on scope the dynamic changes and changes quickly. Many of these "lifers" would be throwing apps in without a thought in the world. Furthermore, there were plenty of guys that fell in to this category that came to DAL in the last wave. Why? Because the risk was worth the rewards, even with a CH11 contract, and even with the most recent scope sales. Thus far the gamble seems to have paid off.
I have many friends in the top 300 at a few regionals (top 20%) that will leave the second they get interviewed and hired. As for the few that state they are staying put, some mean it, but most just do not want to get furloughed in the next round. They saw too many friends back in 2001 and again in 2007 (UAL and CAL) barely finish training before they were going to Asia to find jobs.