It does not need to be. The problem is that when a unit gets replaced, the tenants cannot get an equivalent unit in the new building at the same rent. So they a

It does not need to be. The problem is that when a unit gets replaced, the tenants cannot get an equivalent unit in the new building at the same rent. So they are incentivized to try to stop new construction. By all means build more units in the same area, but guarantee that folks who will be displaced can move back in one of the units for their existing rent. Then everyone wins. I encourage you to think beyond one or two examples where things have gone wrong and instead try to figure out how you could take the fundamental idea and improve it.