Only renewing and building up economically depressed places is a huge issue of gentrification and inequity. Why should it be so that only the poor should be rad

Only renewing and building up economically depressed places is a huge issue of gentrification and inequity. Why should it be so that only the poor should be radically impacted by necessary city changes? A really prime example of this is NYC construction post-war where robert moses demolished many homes of people of color to build various highways or in the bay area where the construction of above ground bart majorly impacted the overwhelmingly black section of west oakland. I'm not saying that we shouldn't build transit, or new construction but to only build it in economically depressed areas - which are often ghettoized places for ethnic minorities - seems fairly wrong. This seems to be a major part about why many people who are advocates for the poor have an issue with new construction - because it results in displacement of people who can't afford it