If you read the above link [1], it's not survivor bias:
"Another way to cut the data is to compare movers and nonmovers across gentrifying and nongentrifying neighborhoods. Interestingly, there is a slightly larger increase in credit score (1.5 points more) associated with residents of the gentrifying neighborhoods who moved to a different neighborhood relative to those who lived in a gentrifying neighborhood but did not move. So it appears that, on average, movers are even slightly more positively affected by gentrification than nonmovers."
Fair enough. I just Ctrl-F'd 'bias' and had nothing, guess I could have been more thorough.
That paragraph still fails to specify whether this applies only to homeowners and renters, or whether that still holds when looking just at rentership. We have "original resident renters living in gentrifying neighborhood benefit", and we have "movers overall benefit", but that doesn't necessarily imply "original resident renters who (were forced to) move benefit."
"Another way to cut the data is to compare movers and nonmovers across gentrifying and nongentrifying neighborhoods. Interestingly, there is a slightly larger increase in credit score (1.5 points more) associated with residents of the gentrifying neighborhoods who moved to a different neighborhood relative to those who lived in a gentrifying neighborhood but did not move. So it appears that, on average, movers are even slightly more positively affected by gentrification than nonmovers."