What's The Point..... ?

I never have it fill empty homes - I only want the original characters and the sims I create living in the world. I use MCCC and set the percentage for having children high though, so the original townie sims / premades have many children usually, and I usually play with big families. So very soon I need the empty lots. I play this way because I'd rather the world be populated by the original residents and any sims I play, and new sims to be made generationally from these families over time, rather than all the original sims dying off with no legacies left behind, and the world just being filled up with randomly generated Maxis mess townies whose eyebrows do not match their hair color and who seem to have been given the ugliest mix of features that can be given. But that's just my preference.