That's also what all these candidates are saying. The usage of the word gentrification is often ambiguous because some people sometimes use it to refer to the process of economic growth and other people sometimes use it to refer to the process by which low-income residents are priced out of their own neighborhoods.

Everybody* thinks that gentrification in the first sense is good, and most people think gentrification in the displacement sense is bad. But a lot of people think you can't have the growth without displacement.

*some extreme activists are literally against growth, but that's a very vocal minority without any institutional pull