Don't agree.

white flight = moving out of city because of fear, cost, crappy schools, etc. is flight. A white person moving to the boondocks because they want to homestead or live off grid is not "flight".

gentrifier = higher income person/family moving into a city or neighborhood, raising the housing costs by doing so, causing the long time residents to leave because of said costs and changing the culture of said area because the old families don't live there anymore.