Yeah, I've yet to hear of any easy, economical, sustainable, way to simultaneously revitalize an area, attract new business, improve quality and quantity of housing, and reduce crime while also not displacing any current residents, not tearing down any older buildings other than dilapidated ones, not increasing average rent, and not "flooding the area with traffic and outsiders".

That's just not how it works. You get both the good and the bad or you get neither.