"It was a light bulb moment for me to see that this was a rational result even if it “felt” greedy to me." I am not that surprised. Systems with some slack in

"It was a light bulb moment for me to see that this was a rational result even if it “felt” greedy to me." I am not that surprised. Systems with some slack in them tend to be more resilient when absorbing shocks in demand, and demand varies over time. If the vacancy rate is, say, 0.1 per cent, pretty much no one can move into the city unless they build their own unit or swap with someone moving out. That sounds like a recipe for stagnation. Similarly, if you run a web service, you shouldn't want your server to run at 95-100 per cent load all the time. Having some slack is valuable.